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Agreement and Plan of Merger - American Radio Systems Corp. and Westinghouse Electric Corp.

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                          AGREEMENT AND PLAN OF MERGER

                                  By and Among

                      AMERICAN RADIO SYSTEMS CORPORATION,

                       WESTINGHOUSE ELECTRIC CORPORATION

                                      and

                              R ACQUISITION CORP.

                                  Dated as of

                               September 19, 1997


<PAGE>   2



                               TABLE OF CONTENTS

                                                                            Page

<TABLE>
<S>        <C>                                                                      <C>
ARTICLE 1 DEFINED. TERMS.............................................................2

ARTICLE 2 THE MERGER.................................................................2
  2.1      The Merger................................................................2
  2.2      Closing...................................................................2
  2.3      Effective Time............................................................2
  2.4      Effect of the Merger......................................................2
  2.5      Certificate of Incorporation..............................................2
  2.6      Bylaws....................................................................3
  2.7      Directors and Officers....................................................3
  2.8      Tower Distribution/Tower Merger...........................................3

ARTICLE 3 CONVERSION OF SHARES; EXCHANGE OF CERTIFICATES.............................3
  3.1      Conversion of Capital Stock...............................................3
  3.2      Exchange of Certificates.  ...............................................4
  3.3      Closing of American's Transfer Books......................................5
  3.4      Dissenting Shares.........................................................5
  3.5      Tower Common Stock........................................................6

ARTICLE 4 REPRESENTATIONS AND WARRANTIES OF AMERICAN.................................6
  4.1      Organization and Business; Power and Authority; Effect of Transaction.....6
  4.2      Financial and Other Information.  ........................................8
  4.3      Changes in Condition......................................................8
  4.4      Properties................................................................9
  4.5      Compliance with Private Authorizations....................................9
  4.6      Compliance with Governmental Authorizations and Applicable
            Law; Litigation..........................................................9
  4.7      Related Transactions.....................................................11
  4.8      Taxes and Tax Matters....................................................11
  4.9      Employee Retirement Income Security Act of 1974..........................12
  4.10     Insurance................................................................14
  4.11     Authorized Capital Stock.................................................15
  4.12     Employment Arrangements..................................................15
  4.13     Voting Requirements......................................................15
  4.14     Brokers..................................................................16
  4.15     Information Supplied.....................................................16
  4.16     Ordinary Course of Business..............................................16
  4.17     Environmental Matters....................................................17
  4.18     State Takeover Statutes..................................................17
  4.19     Opinion of Financial Advisor.............................................17
  4.20     Contracts; Debt Instruments..............................................17

ARTICLE 5 REPRESENTATIONS AND WARRANTIES OF MERGEPARTY..............................18
  5.1      Organization and Business; Power and Authority; Effect of Transaction....18
  5.2      Compliance with Governmental Authorizations and Applicable
            Law; Litigation.........................................................19
  5.3      Opinion of Financial Advisor.............................................20
</TABLE>



<PAGE>   3

<TABLE>
<S>        <C>                                                                      <C>
  5.4      Mergeparty Financing.....................................................20

ARTICLE 6 COVENANTS.................................................................20
  6.1      Access to Information; Confidentiality...................................20
  6.2      Agreement to Cooperate...................................................21
  6.3      Public Announcements.....................................................23
  6.4      Notification of Certain Matters..........................................23
  6.5      Stockholder Approval.  ..................................................23
  6.6      Information Statement.  .................................................24
  6.7      Miscellaneous............................................................24
  6.8      Option Plans.............................................................24
  6.9      Conduct of Business by Mergeparty Pending the Merger.....................26
  6.10     Conduct of Business by American Pending the Merger.......................26
  6.11     Control of Operations....................................................28
  6.12     Directors', Officers' and Employees' Indemnification and Insurance.......28
  6.13     Solicitation of Employees................................................30
  6.14     Change of Name...........................................................30
  6.15     Benefit Plans............................................................30
  6.16     American Cumulative Preferred Stock......................................30
  6.17     American Tower Transaction...............................................31
  6.18     Purchase Price Adjustment................................................36
  6.19     Tower Leases.............................................................39

ARTICLE 7 CLOSING CONDITIONS........................................................40
  7.1      Conditions to Obligations of Each Party to Effect the Merger.............40
  7.2      Conditions to Obligations of Mergeparty..................................41
  7.3      Conditions to Obligations of American....................................42

ARTICLE 8 TERMINATION, AMENDMENT AND WAIVER.........................................42
  8.1      Termination..............................................................42
  8.2      Effect of Termination.    ...............................................43

ARTICLE 9 GENERAL PROVISIONS........................................................44
  9.1      Amendment................................................................44
  9.2      Waiver...................................................................44
  9.3      Fees, Expenses and Other Payments........................................44
  9.4      Notices..................................................................44
  9.5      Specific Performance; Other Rights and Remedies..........................45
  9.6      Survival of Representations, Warranties, Covenants and Agreements........46
  9.7      Severability.............................................................46
  9.8      Counterparts.............................................................46
  9.9      Section Headings.........................................................46
  9.10     Governing Law............................................................46
  9.11     Further Acts.............................................................46
  9.12     Entire Agreement; No Other Representations or Agreements.................47
  9.13     Assignment...............................................................47
  9.14     Parties in Interest......................................................47
  9.15     Mutual Drafting..........................................................47
  9.16     Obligations of American and of Mergeparty................................47
  9.17     Mergeparty Agent for Mergeparty Subsidiary...............................48
</TABLE>



<PAGE>   4




APPENDIX A:                Definitions

EXHIBITS:

  EXHIBIT A:        Restated Certificate of Incorporation (Section 2.5)
  EXHIBIT B:        Market Fee Schedule
  EXHIBIT C:        Form of Opinion of FCC Counsel to American


<PAGE>   5




                          AGREEMENT AND PLAN OF MERGER

         Agreement and Plan of Merger, dated as of September 19, 1997, by and
among American Radio Systems Corporation, a Delaware corporation ("American"),
Westinghouse Electric Corporation, a Pennsylvania corporation ("Mergeparty"),
and R Acquisition Corp., a Delaware corporation ("Mergeparty Subsidiary").

                              W I T N E S S E T H:

         WHEREAS, the respective Boards of Directors of American, Mergeparty
and Mergeparty Subsidiary have approved the merger (the "Merger") of Mergeparty
Subsidiary into American on the terms and conditions set forth in this
Agreement and Plan of Merger (this "Agreement") and have approved this
Agreement; and

         WHEREAS, the Board of Directors of American has determined that the
sale of American Tower Systems Holding Corporation ("American Tower") at this
time is not in the best interest of American and its stockholders, and that the
distribution of all of the common stock of American Tower through a pro rata
distribution of the common stock of American Tower to the holders of American
common stock (the "Tower Distribution"), on the terms and conditions set forth
in this Agreement, is fair to and in the best interests of, American and its
stockholders, the Board of Directors of American has approved the Tower
Distribution and has directed that the Tower Distribution be submitted to the
stockholders of American for their approval; and

         WHEREAS, the Board of Directors of Mergeparty has approved and adopted
this Agreement as the sole stockholder of Mergeparty Subsidiary, and the Board
of Directors of American has directed that this Agreement be submitted to the
stockholders of American for their approval and adoption; and

         WHEREAS, this Agreement provides that Mergeparty Subsidiary shall be
merged into American, and American shall be the surviving corporation; and

         WHEREAS, the parties agree that, subject to certain conditions
contained in this Agreement, the consummation of the Tower Distribution is a
condition of the consummation of the Merger; and

         WHEREAS, as a condition of the willingness of Mergeparty to enter into
this Agreement, and as an inducement thereto Mergeparty and certain of the
stockholders of American who are entitled to cast votes in favor of approval
and adoption of the Merger Agreement sufficient to constitute the Required Vote
are delivering written consents of stockholders approving and adopting the
Merger Agreement and approving the Tower Distribution.

         NOW, THEREFORE, in consideration of the premises and the
representations, warranties, covenants and agreements herein contained and
other valuable consideration, the receipt and adequacy whereof are hereby
acknowledged, the parties hereto hereby, intending to be legally bound,
represent, warrant, covenant and agree as follows:


<PAGE>   6





                                   ARTICLE 1

                                 DEFINED TERMS

         As used herein, unless the context otherwise requires, the terms
defined in Appendix A shall have the respective meanings set forth therein.
Terms defined in the singular shall have a comparable meaning when used in the
plural, and vice versa, and the reference to any gender shall be deemed to
include all genders. Unless otherwise defined or the context otherwise clearly
requires, terms for which meanings are provided in this Agreement shall have
such meanings when used in either Disclosure Schedule and each Collateral
Document executed or required to be executed pursuant hereto or thereto or
otherwise delivered, from time to time, pursuant hereto or thereto. References
to "hereof," "herein" or similar terms are intended to refer to the Agreement
as a whole and not a particular section, and references to "this Section" or
"this Article" are intended to refer to the entire section or article and not a
particular subsection thereof. The term "either party" shall, unless the
context otherwise requires, refer to American, on the one hand, and Mergeparty
and Mergeparty Subsidiary, on the other hand.

                                   ARTICLE 2

                                   THE MERGER

         2.1 The Merger. (a) Upon the terms and subject to the conditions set
forth in this Agreement, and in accordance with the Delaware General
Corporation Law (the "DCL"), at the Effective Time, Mergeparty Subsidiary shall
be merged with and into American. As a result of the Merger, the separate
corporate existence of Mergeparty Subsidiary shall cease and American shall
continue as the surviving corporation in the Merger (sometimes referred to, as
such, as the "Surviving Corporation").

         2.2 Closing. Unless this Agreement shall have been terminated pursuant
to Section 8.1 and subject to the satisfaction or, to the extent permitted by
Applicable Law, waiver of the conditions set forth in Article 7, the closing of
the Merger (the "Closing") will take place, at 10:00 a.m., on the Closing Date,
at the offices of Cravath, Swaine & Moore, 825 Eighth Avenue, New York, New
York 10019, on the date that is the second (2nd) day after the date on which
all of the conditions set forth in Article 7 (other than those which require
delivery of opinions or documents at the Closing) shall have been satisfied or
waived, unless another date, time or place is agreed to in writing by the
parties. The date on which the Closing occurs is herein referred to as the
"Closing Date."

         2.3 Effective Time. Subject to the provisions of this Agreement, as
promptly as practicable after the Closing, the parties hereto shall cause the
Merger to be consummated by filing a Certificate of Merger and any related
filings required under the DCL with the Secretary of State of the State of
Delaware. The Merger shall become effective at such time as such documents are
duly filed with the Secretary of State of the State of Delaware, or at such
later time as is specified in such documents (the "Effective Time").

         2.4 Effect of the Merger. The Merger shall have the effects provided
for under the DCL.

         2.5 Certificate of Incorporation. The Certificate of Incorporation of
American, as in effect immediately prior to the Effective Time, shall be
amended as of the Effective Time as described in




                                     - 2 -
<PAGE>   7

Exhibit A and, as so amended, such Certificate of Incorporation, together with
the certificates of designation for the American Cumulative Preferred Stock and
the American Convertible Preferred Stock, shall be the Certificate of
Incorporation of the Surviving Corporation until thereafter changed or amended
as provided therein or by Applicable Law. Such amendment shall not be deemed to
affect in any manner the Certificates of Designation of (i) the 11_% Series B
Cumulative Exchangeable Preferred Stock, par value $.01 per share, of American
(the "American Cumulative Preferred Stock") or (ii) the 7% Convertible
Exchangeable Preferred Stock, par value $.01 per share, of American (the
"American Convertible Preferred Stock" and, collectively with the American
Cumulative Preferred Stock, the "American Preferred Stock").

         2.6 Bylaws. The bylaws of American in effect at the Effective Time
shall be the bylaws of the Surviving Corporation until amended in accordance
with Applicable Law and the Organic Documents of American.

         2.7 Directors and Officers. From and after the Effective Time, until
successors are duly elected or appointed and qualified, or upon their earlier
resignation or removal, in accordance with Applicable Law and the Organic
Documents of Mergeparty Subsidiary and American, as applicable, (a) the
directors of Mergeparty Subsidiary at the Effective Time shall be the directors
of the Surviving Corporation, and (b) the officers of American at the Effective
Time shall be the officers of the Surviving Corporation.

         2.8 Tower Distribution/Tower Merger. The Board of Directors of
American in its sole and absolute discretion may abandon the Tower Distribution
and, in lieu thereof, effect the distribution of all of the common stock of
American Tower Sub to the holders of American Common Stock through a merger of
American Tower with and into American (the "Tower Merger"); provided that the
Tower Distribution shall not be abandoned unless an agreement of merger
relating to the Tower Merger shall be approved by the Board of Directors of
American and approved and adopted by the stockholders of American; provided
further, that the Board of Directors of American in its sole and absolute
discretion may abandon the Tower Distribution and the Tower Merger by
delivering written notice to such effect to Mergeparty (the "Notice of
Abandonment").

                                   ARTICLE 3

                 CONVERSION OF SHARES; EXCHANGE OF CERTIFICATES

         3.1 Conversion of Capital Stock. At the Effective Time, by virtue of
the Merger and without any action on the part of Mergeparty, Mergeparty
Subsidiary or American or their respective stockholders:

         (a) Each share of Common Stock, par value $1.00 per share, of
Mergeparty Subsidiary issued and outstanding immediately prior to the Effective
Time shall be converted into and become one validly issued, fully paid and
nonassessable share of Common Stock, par value $.01 per share, of the Surviving
Corporation;

         (b) Each share of the American Cumulative Preferred Stock issued and
outstanding immediately prior to the Effective Time shall remain outstanding;




                                     - 3 -
<PAGE>   8


         (c) Each share of the American Convertible Preferred Stock issued and
outstanding immediately prior to the Effective Time shall remain outstanding;

         (d) Subject to paragraph (e) below, each share of Class A Common
Stock, par value $.01 per share ("Class A Common"), each share of Class B
Common Stock, par value $.01 per share ("Class B Common"), and each share of
Class C Common Stock, par value $.01 per share, of American (collectively, the
"American Common Stock") issued and outstanding immediately prior to the
Effective Time (other than Dissenting Shares) shall, by virtue of the Merger
and without any action on the part of the holder thereof, be converted into the
right to receive $44.00 (the "Merger Consideration"); and

         (e) Each share of American Common Stock owned by American or any of
its Subsidiaries or Mergeparty or any of its Subsidiaries immediately prior to
the Effective Time shall automatically be canceled and extinguished without any
conversion thereof and no payment shall be made with respect thereto.

         As a result of the Merger and without any action on the part of the
holder thereof, at the Effective Time all shares of American Common Stock shall
cease to be outstanding and shall be canceled and retired and shall cease to
exist, and each holder of any certificates formerly representing such shares
shall thereafter cease to have any rights with respect to such shares, except,
subject to paragraph (e) above, the right to receive, without interest, the
Merger Consideration, or, in the case of a holder of Dissenting Shares, the
right to perfect the right to receive payment for Dissenting Shares pursuant to
Section 262 of the DCL.

         3.2 Exchange of Certificates.

         (a) From time to time, on or prior to or after the Effective Time,
Mergeparty shall deposit or cause to be deposited with an exchange agent
selected by Mergeparty and not reasonably disapproved of by American (the
"Exchange Agent") in trust for the benefit of the American stockholders cash in
amounts and at times necessary for the prompt payment of the Merger
Consideration upon the surrender of Certificates.

         (b) Not more than five (5) business days subsequent to the Effective
Time, the Exchange Agent shall mail to each holder of record of a certificate
or certificates that immediately prior to the Effective Time represented
outstanding shares of American Common Stock (the "Certificates") (i) a letter
of transmittal (which shall specify that delivery shall be effected, and risk
of loss and title to the Certificates shall pass, only upon actual delivery of
the Certificates to the Exchange Agent and shall be in such form and have such
other provisions as American and Mergeparty may agree) and (ii) instructions
for use in effecting the surrender of the Certificates in exchange for the
Merger Consideration. Upon surrender of Certificates for cancellation to the
Exchange Agent, together with a duly executed letter of transmittal and such
other documents as the Exchange Agent shall reasonably require, the holder of
such Certificate shall receive in exchange therefor the Merger Consideration
multiplied by the number of shares of American Common Stock formerly
represented by such Certificates. The amount paid to the holder of Certificates
shall be in the form of a wire transfer of immediately available funds if so
requested by any holder entitled to receive not less than $500,000 in cash, and
the cost of such wire transfers shall be borne by the Surviving Corporation.
Such letter of transmittal and instructions shall be available at the Closing
for holders of American Common Stock. Notwithstanding the foregoing, neither
the Exchange




                                     - 4 -
<PAGE>   9

Agent nor any party hereto shall be liable to a holder of shares of American
Common Stock for any Merger Consideration delivered to a public official
pursuant to applicable abandoned property, escheat or similar Laws.

         (c) Promptly following the date which is six (6) months after the
Closing Date, the Exchange Agent shall deliver to Mergeparty all cash in its
possession relating to the transactions described in this Agreement that remain
unclaimed, and the Exchange Agent's duties shall terminate. Thereafter, each
holder of a Certificate may surrender such Certificate to the Surviving
Corporation and (subject to applicable abandoned property, escheat and similar
Laws) receive in exchange therefor the aggregate Merger Consideration to which
such holder is entitled, without any interest thereon.

         (d) If the Merger Consideration (or any portion thereof) is to be paid
to a Person other than the Person in whose name the Certificate surrendered in
exchange therefor is registered, it shall be a condition to the payment of the
Merger Consideration that the Certificate so surrendered shall be properly
endorsed or accompanied by appropriate stock powers (with signatures guaranteed
in accordance with the transmittal letter) and otherwise in proper form for
transfer, that such transfer otherwise be proper and that the Person requesting
such transfer pay to the Exchange Agent any transfer or other Taxes payable by
reason of the foregoing or establish to the satisfaction of the Exchange Agent
that such Taxes have been paid or are not required to be paid.

         (e) In the event any Certificate shall have been lost, stolen or
destroyed, upon the making of an affidavit of that fact by the Person claiming
such Certificate to be lost, stolen or destroyed and subject to such other
reasonable conditions as the Exchange Agent may impose, the Exchange Agent
shall issue in exchange for such lost, stolen or destroyed Certificate the
Merger Consideration (to the extent applicable) deliverable in respect thereof
as determined in accordance with this Article. When authorizing such issue of
the Merger Consideration in exchange therefor, the Exchange Agent may, in its
discretion and as a condition precedent to the issuance thereof, require the
owner of such lost, stolen or destroyed Certificate (if other than a recognized
financial institution) to give the Exchange Agent a bond or other surety in
such sum as it may reasonably direct as indemnity against any Claim that may be
made against the Exchange Agent with respect to the Certificate alleged to have
been lost, stolen or destroyed.

         (f) At and after the Effective Time, the holder of a Certificate shall
cease to have any rights as an American stockholder, except for the right to
surrender Certificates in the manner prescribed by Section 3.2 in exchange for
payment of the Merger Consideration, or, in the case of a holder of Dissenting
Shares, the right to perfect the right to receive payment for Dissenting Shares
pursuant to Section 262 of the DCL.

         (g) The Surviving Corporation shall be entitled to, or shall be
entitled to cause the Exchange Agent to, deduct and withhold from the
consideration otherwise payable pursuant to this Agreement to any holder of
shares of American Common Stock such amounts as are required to be deducted and
withheld with respect to the making of such payment under the Code, or any
provision of state, local or foreign Tax Law. To the extent that amounts are so
withheld by the Surviving Corporation or the Exchange Agent, as the case may
be, such withheld amounts shall be treated for all purposes of this Agreement
as having been paid to the holder of the shares of American Common Stock in
respect of which such deduction and withholding was made by the Surviving
Corporation or the Exchange Agent.




                                     - 5 -
<PAGE>   10

         (h) The Exchange Agent shall invest any funds held by it for purposes
of this Section 3.2 as directed by Mergeparty, on a daily basis. Any interest
and other income resulting from such investments shall be paid to Mergeparty
and any risk of loss resulting from such investments shall be borne by
Mergeparty.

         3.3 Closing of American's Transfer Books. At the Effective Time, the
stock transfer books of American shall be closed and no transfer of shares of
American Common Stock which were outstanding immediately prior to the Effective
Time shall thereafter be made. If, after the Effective Time, subject to the
terms and conditions of this Agreement, Certificates formerly representing
American Common Stock are presented to the Surviving Corporation, they shall be
canceled and exchanged for the Merger Consideration in accordance with the
provisions of this Article.

         3.4 Dissenting Shares.

         (a) Notwithstanding any other provision of this Agreement to the
contrary, shares of American Common Stock that are outstanding immediately
prior to the Effective Time and which are held by American stockholders who
shall have not voted in favor of the Merger or consented thereto in writing and
who shall be entitled to and shall have demanded properly in writing appraisal
rights for such shares of American Common Stock in accordance with Section 262
of the DCL and who shall not have withdrawn such demand or otherwise have
forfeited appraisal rights (collectively, the "Dissenting Shares"), shall not
be converted into or represent the right to receive the Merger Consideration
payable in respect of each share of American Common Stock represented thereby.
Such American stockholders shall be entitled to receive payment of the
appraised value of such shares of American Common Stock held by them in
accordance with the provisions of the DCL; provided, however, that all
Dissenting Shares held by American stockholders who shall have failed to
perfect or who effectively shall have withdrawn, forfeited or lost their
appraisal rights with respect to such shares of American Common Stock under the
DCL shall thereupon be deemed to have been converted into and to have become
exchangeable for, as of the Effective Time, the right to receive, without any
interest thereon, the Merger Consideration upon surrender, in the manner
provided in Section 3.2, of the Certificates with respect to such shares.

         (b) American shall give Mergeparty prompt notice of any demands for
appraisal rights received by it, withdrawals of such demands, and any other
instruments served pursuant to the DCL and received by American and relating
thereto. American shall give Mergeparty the opportunity to direct all
negotiations and proceedings with respect to demands for appraisal rights under
the provisions of the DCL. American shall not, except with the prior written
consent of Mergeparty, make any payment with respect to any demands for
appraisal rights, or offer to settle, or settle, any such demands.

         3.5 Tower Common Stock. In the event that prior to the Effective Time,
the Tower Common Stock distributable upon the Tower Distribution or issuable in
the Tower Merger shall not have been distributed or issued, American and
Mergeparty shall cooperate with each other so that the Exchange Agent may
effect such issuance or distribution simultaneously with the exchange of
Certificates for Merger Consideration as provided in this Article 3, together
with any cash in lieu of a fractional share and any dividends or other
distributions which may be payable to a holder of Tower Common Stock following
the Effective Time.




                                     - 6 -
<PAGE>   11

                                   ARTICLE 4

                   REPRESENTATIONS AND WARRANTIES OF AMERICAN

         Except as set forth with respect to specifically identified
representations and warranties in the American Disclosure Schedule, American
hereby represents and warrants to Mergeparty and Mergeparty Subsidiary as
follows:

         4.1 Organization and Business; Power and Authority; Effect of
Transaction.

         (a) American is a corporation duly incorporated, validly existing and
in good standing under the laws of the State of Delaware and has all requisite
power and authority (corporate and other) to own or hold under lease its
properties and to conduct its business as now conducted and as presently
proposed to be conducted. American is duly qualified and in good standing as a
foreign corporation in each other jurisdiction (as shown on Section 4.1(a) of
the American Disclosure Schedule) in which the character of the property owned
or leased by it or the nature of its business or operations requires such
qualification, with full power and authority (corporate and other) to carry on
the business in which it is engaged, except in such jurisdictions where the
failure to be so qualified or in good standing, individually or in the
aggregate, is not reasonably likely to have a Material Adverse Effect on
American.

         (b) Each of American and its Subsidiaries has all requisite power and
authority (corporate and other) to execute, deliver and perform its obligations
under this Agreement and each Collateral Document executed or required to be
executed by such party pursuant hereto or thereto and to consummate the Merger
and the other transactions contemplated hereby and thereby, and the execution,
delivery and performance of this Agreement and each Collateral Document
executed or required to be executed pursuant hereto or thereto have been duly
authorized by all requisite corporate or other action on the part of American
and its Subsidiaries, other than the approval of the American stockholders
contemplated by Section 4.13 of this Agreement, and no other corporate
proceedings on the part of American or any of its Subsidiaries are necessary to
authorize this Agreement or the transactions contemplated hereby or to
consummate the Merger or the other transactions so contemplated (other than,
with respect to the Merger, the Required Vote). This Agreement has been duly
executed and delivered by American and constitutes, and each Collateral
Document executed or required to be executed by American and its Subsidiaries
pursuant hereto or to consummate the Merger when executed and delivered by
American and its Subsidiaries, as applicable, will constitute, a valid and
binding obligation of American and its Subsidiaries, as applicable, enforceable
in accordance with their respective terms, except as such enforceability may be
limited by bankruptcy, moratorium, insolvency and similar laws affecting the
rights and remedies of creditors and obligations of debtors generally and by
general principles of equity. The provisions of Section 203 of the DCL will not
apply to this Agreement or the Merger. As of the date hereof, the Board of
Directors of American, at a meeting duly called and held at which a quorum was
present throughout, has approved the Merger and this Agreement, and has
recommended that the American stockholders approve and adopt this Agreement and
the transactions contemplated hereby, including without limitation the Merger.

         (c) The execution, delivery and performance by American and its
Subsidiaries, as applicable, of this Agreement and any Collateral Document
executed or required to be executed by such parties pursuant hereto or thereto
do not, and the consummation by American of the Merger and the other




                                     - 7 -
<PAGE>   12

transactions contemplated hereby and thereby, and compliance with the terms,
conditions and provisions hereof or thereof by such parties will not:

                  (i) (A) Except as set forth in Section 4.1(c) of the American
         Disclosure Schedule, conflict with, or result in a breach or violation
         of, or constitute a default under, any Organic Document of American or
         its Subsidiaries, as applicable, or (B) conflict with, or result in a
         breach or violation of, or constitute a default under, or permit the
         termination, cancellation or acceleration of any obligation or
         liability in, or but for any requirement of the giving of notice or
         passage of time or both would constitute such a conflict with, breach
         or violation of, or default under, or permit any such termination,
         cancellation or acceleration of, any agreement, arrangement, contract,
         undertaking, understanding, Applicable Law or other obligation or
         Private Authorization of American or its Subsidiaries, as applicable,
         except, in the case of clause (B), for such conflicts, breaches,
         violations, terminations, cancellations, defaults or accelerations
         that would not, individually or in the aggregate, be reasonably likely
         to have a Material Adverse Effect on American; or

                  (ii) result in or permit the creation or imposition of any
         Lien upon any property now owned or leased by American except for such
         Liens that would not, individually or in the aggregate, be reasonably
         likely to have a Material Adverse Effect on American; or

                  (iii) require any Governmental Authorization or Governmental
         Filing except for (A) the FCC Consents, (B) filings under the
         Hart-Scott-Rodino Act, (C) the filing with the Commission of (I) the
         Information Statement and (II) such reports under Section 13(a) or
         15(d) of the Exchange Act as may be required in connection with this
         Agreement and the transactions contemplated by this Agreement, (D) the
         filing of the Certificate of Merger with the Delaware Secretary of
         State and appropriate documents with the relevant authorities of other
         states in which American is qualified to do business and (E) such
         other Governmental Authorizations and Governmental Filings the failure
         of which to be made or obtained would not be individually or in the
         aggregate, reasonably likely to have a Material Adverse Effect on
         American.

         (d) American does not have any direct or indirect Subsidiaries other
than those set forth on Section 4.1(d) of the American Disclosure Schedule;
each of such Subsidiaries is (i) wholly-owned unless noted otherwise in Section
4.1(d) of the American Disclosure Schedule, (ii) a corporation which is duly
organized, validly existing and in good standing under the laws of the
respective state of incorporation set forth opposite its name on Section 4.1(d)
of the American Disclosure Schedule, and (iii) duly qualified and in good
standing as a foreign corporation in each other jurisdiction (as shown on
Section 4.1(d) of the American Disclosure Schedule) in which the character of
the property owned or leased by it or the nature of its business or operations
requires such qualification, with full power and authority (corporate and
other) to carry on the business in which it is engaged, except where the
failure to be so qualified or in good standing, individually or in the
aggregate, would not be reasonably likely to have a Material Adverse Effect on
American. As of the date hereof, American owns, directly or indirectly, all of
the outstanding capital stock and equity interests (as shown in Section 4.1(d)
of the American Disclosure Schedule) of such Subsidiaries, free and clear of
all Liens (except as set forth in the American Financial Statements or Section
4.1(d) of the American Disclosure Schedule), and all such stock has been duly
authorized and validly issued and is fully paid and nonassessable. There are no
outstanding Option Securities or Convertible Securities, or agreements or
understandings of any nature whatsoever, relating to




                                     - 8 -
<PAGE>   13

the authorized and unissued or outstanding capital stock of such Subsidiaries
(except as set forth in the American Financial Statements or Section 4.1(d) of
the American Disclosure Schedule).

         4.2 Financial and Other Information. American has heretofore furnished
to Mergeparty copies of the audited consolidated financial statements of
American and its Subsidiaries set forth in its Annual Report on Form 10-K (the
"American 10-K") for the fiscal year ended December 31, 1996 and the unaudited
consolidated financial statements of American and its Subsidiaries set forth in
its Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 1997
(collectively, the "American Financial Statements"). The American Financial
Statements, including in each case the notes thereto, comply as to form, in all
material respects, with applicable accounting requirements and the published
rules and regulations of the Commission with respect thereto, have been
prepared in accordance with GAAP applied on a consistent basis throughout the
periods covered thereby, except as otherwise noted therein, and fairly present
in all material respects the financial condition, results of operations and
cash flows of American and its Subsidiaries on the bases therein stated, as of
the respective dates thereof, and for the respective periods covered thereby
subject, in the case of unaudited financial statements, to normal year-end
audit adjustments and accruals. American has filed all required reports and
other documents with the Commission since July 1, 1995 (the "American SEC
Documents").  Except as set forth in the American SEC Documents filed and
publicly available prior to the date hereof (the "Filed American SEC
Documents"), neither American nor any of its Subsidiaries has any liabilities
or obligations of any nature (whether accrued, absolute, contingent or
otherwise) which, individually or in the aggregate, would be reasonably likely
to have a Material Adverse Effect on American. None of the American Disclosure
Schedule or the American SEC Documents contains or will contain any untrue
statement of a material fact or omits or will omit to state a material fact
required to be stated herein or therein or necessary in order to make the
statements contained herein or therein, in light of the circumstances under
which they were made, not misleading.

         4.3 Changes in Condition. Except as set forth in Section 4.3 of the
American Disclosure Schedule, between June 30, 1997 and the date hereof, there
has been no Material Adverse Change in American.

         4.4 Properties. (a) American and each of its Subsidiaries (other than
the Tower Subsidiaries) has good and marketable title to all material parcels
of real property owned by it and good and merchantable title to all material
items of property and assets, tangible and intangible, (i) reflected in the
financial statements of American as of June 30, 1997, and (ii) acquired after
June 30, 1997, except in each case for those sold or otherwise disposed of
since June 30, 1997, in each case free and clear of all Liens, except (x)
Permitted Liens and (y) Liens set forth in the American Financial Statements or
Section 4.4 of the American Disclosure Schedule.

         (b) All of the assets of American and its Subsidiaries material to the
continued operation of their respective businesses are in good operating
condition, reasonable wear and tear excepted, and usable in the ordinary course
of business, except where the failure to be in such condition or so usable
would not, individually or in the aggregate, be reasonably likely to have a
Material Adverse Effect on American.

         4.5 Compliance with Private Authorizations. American and each of its
Subsidiaries (other than the Tower Subsidiaries) has obtained all Private
Authorizations which are necessary for the ownership and operation by American
or its Subsidiaries of the business of American and its Subsidiaries, taken as
a whole, and the conduct of business thereof as now conducted and which, if not




                                     - 9 -
<PAGE>   14

obtained and maintained, would, individually or in the aggregate, be reasonably
likely to have a Material Adverse Effect on American. All such Private
Authorizations are, to American's knowledge, in full force and effect, and
neither American nor any of its Subsidiaries (other than the Tower
Subsidiaries) is, to American's knowledge, in breach or violation of, or in
default in the performance, observance or fulfillment of, any such Private
Authorization, and, to American's knowledge, no Event exists or has occurred,
which constitutes, or but for any requirement of the giving of notice or
passage of time or both would constitute, such a breach, violation or default,
under any such Private Authorization, except for such defaults, breaches or
violations as would not, individually or in the aggregate, be reasonably likely
to have a Material Adverse Effect on American.

         4.6 Compliance with Governmental Authorizations and Applicable Law;
Litigation.

         (a) Section 4.6(a) of the American Disclosure Schedule contains a list
of each material Governmental Authorization (including without limitation all
material American FCC Licenses) required under Applicable Laws to own and
operate the business of American and its Subsidiaries (other than the Tower
Subsidiaries), including without limitation each of the American Stations, as
currently operated, all of which are in full force and effect, subject to such
qualifications and exceptions as may be set forth in Section 4.6(a) of the
American Disclosure Schedule. Certain of the Subsidiaries of American (other
than any of the Tower Subsidiaries) are the authorized legal holders of the
American FCC Licenses listed in Section 4.6(a) of the American Disclosure
Schedule, none of which is subject to any restriction or condition which would
limit in any material respect the operations of any of the American Stations as
currently conducted except as noted in Section 4.6(a) of the American
Disclosure Schedule. The American FCC Licenses listed in Section 4.6(a) of the
American Disclosure Schedule are valid and in full force and effect and are not
impaired in any material respect by any act or omission of American or any of
its Subsidiaries, subject to such qualifications and exceptions as may be set
forth in Section 4.6(a) of the American Disclosure Schedule; and the operation
of each of the American Stations is in accordance with such American FCC
Licenses in all material respects, except to the extent so listed in Sections
4.6(a) and (b) of the American Disclosure Schedule. American is fully qualified
to be the transferor of control of the American FCC Licenses. All material
reports, forms and statements required to be filed by American or any of its
Subsidiaries with the FCC with respect to each of the American Stations have
been filed and are true, complete and accurate in all material respects.
American or one of its Subsidiaries (other than the Tower Subsidiaries) has
obtained all Governmental Authorizations in addition to the American FCC
Licenses listed in Section 4.6(a) of the American Disclosure Schedule which are
necessary for the ownership or operations or the conduct of the business of
American and its Subsidiaries, taken as a whole (except with respect to the
American Brokered Stations), as now conducted and which, if not obtained and
maintained, would, individually or in the aggregate, be reasonably likely to
have a Material Adverse Effect on American and American's performance with
respect thereto, and the operation of the American Brokered Stations is in
accordance with all applicable Governmental Authorizations except where the
failure to be so in accordance would not be reasonably likely to have a
Material Adverse Effect on American. As of the date hereof, except as noted in
Section 4.6(a) of the American Disclosure Schedule, no application, action or
proceeding is pending for the renewal or material modification of any of the
American FCC Licenses and, to American's knowledge, except as noted in Section
4.6(b) of the American Disclosure Schedule, there is not now before the FCC any
material investigation, proceeding, notice of violation, order of forfeiture or
complaint against American or any of its Subsidiaries relating to any of the
American Stations or other FCC licensed facilities that, if adversely decided,
would be reasonably likely to have a Material Adverse Effect on American (and
as of the date hereof American does not have knowledge of any basis that would




                                     - 10 -
<PAGE>   15

cause the FCC not to renew any of the American FCC Licenses). Except as noted
in Schedule 4.6(b) of the American Disclosure Schedule, as of the date hereof,
there is not now pending and, to American's knowledge, there is not threatened,
any action by or before the FCC to revoke, suspend, cancel, rescind or modify
in any material respect any of the American FCC Licenses that, if adversely
decided, would be reasonably likely to have a Material Adverse Effect on
American (other than proceedings to amend FCC rules of general applicability to
the radio industry).

         (b) Except as otherwise specifically set forth in Section 4.6(b) of
the American Disclosure Schedule, since January 1, 1996, American and its
Subsidiaries (other than the Tower Subsidiaries) have conducted its and each of
their respective businesses and owned and operated its and each of their
respective properties in accordance with all Applicable Laws (excluding
Environmental Laws) and Governmental Authorizations, except for such breaches,
violations and defaults as, individually or in the aggregate, have not had and
are not reasonably likely to have a Material Adverse Effect on American. Except
as otherwise specifically described in Section 4.6(b) of the American
Disclosure Schedule and except with respect to Environmental Laws, neither
American nor any of its Subsidiaries is in or is charged in writing by any
Authority with, or, to American's knowledge, is threatened or under
investigation by any Authority with respect to, any breach or violation of, or
default in the performance, observance or fulfillment of, any Applicable Law
relating to the ownership and operation of American's and its Subsidiaries'
properties or the conduct of American's and its Subsidiaries' business which
will, individually or in the aggregate, be reasonably likely to have a Material
Adverse Effect on American.  Except as otherwise specifically described in
Section 4.6(b) of the American Disclosure Schedule and except with respect to
Environmental Laws, no Event exists or has occurred, which constitutes, or but
for any requirement of giving of notice or passage of time or both would
constitute, such a breach, violation or default, under any Governmental
Authorization or any Applicable Law, except for such breaches, violations or
defaults as, individually or in the aggregate, have not had and would not be
reasonably likely to have a Material Adverse Effect on American. With respect
to matters, if any, of a nature referred to in Section 4.6(b) of the American
Disclosure Schedule, except as otherwise specifically described in Section
4.6(b) of the American Disclosure Schedule, all such information and matters
set forth in the American Disclosure Schedule, if adversely determined against
American or one of its Subsidiaries (other than the Tower Subsidiaries),
individually or in the aggregate, would not be reasonably likely to have a
Material Adverse Effect on American.

         (c) Except as disclosed in the Filed American SEC Documents or in
Section 4.6(c) of the American Disclosure Schedule, there are no Legal Actions
pending or, to the knowledge of American, threatened against or affecting
American or any of its Subsidiaries (other than the Tower Subsidiaries)
including any action by or before the FCC to revoke, suspend, cancel, rescind
or modify in any material respect any of the American FCC Licenses, except for
Legal Actions that, individually or in the aggregate, would not be reasonably
likely to have a Material Adverse Effect on American.

         4.7 Related Transactions. Except as set forth in Section 4.7 of the
American Disclosure Schedule, as contemplated herein or as disclosed in the
Filed American SEC Documents, no director, officer, Affiliate or "associate"
(as such term is defined in Rule 12b-2 under the Exchange Act) of American or
any of its Subsidiaries is currently a party to any transaction which would be
required to be disclosed under Item 404 of Regulation S-K of the Securities
Act.

         4.8 Taxes and Tax Matters. Except as provided in Section 4.8 of the
American Disclosure Schedule:




                                     - 11 -
<PAGE>   16

         (a) American has filed completely and correctly in all material
respects all Tax Returns which are required by all Applicable Laws to be filed
by it, and has paid, or made adequate provision for the payment of, all
material Taxes which have or may become due and payable pursuant to said Tax
Returns and all other Taxes, governmental charges and assessments received to
date other than those Taxes being contested in good faith for which adequate
provision has been made on the most recent balance sheet forming part of the
American Financial Statements. The Tax Returns of American have been prepared,
in all material respects, in accordance with all Applicable Laws and generally
accepted principles applicable to taxation consistently applied;

         (b) all material Taxes which American is required by law to withhold
and collect have been duly withheld and collected, and have been paid over, in
a timely manner, to the proper Taxing Authorities to the extent due and
payable;

         (c) American has not executed any waiver to extend, or otherwise taken
or failed to take any action that would have the effect of extending, the
applicable statute of limitations in respect of any Tax liabilities of American
for the fiscal years prior to and including the most recent fiscal year;

         (d) American is not a "consenting corporation" within the meaning of
Section 341(f) of the Code. American has at all times been taxable as a
Subchapter C corporation under the Code;

         (e) American has never been a member of any consolidated group (other
than with American and its Subsidiaries) for Tax purposes. American is not a
party to any tax sharing agreement or arrangement, other than with its
Subsidiaries;

         (f) no Liens for Taxes exist with respect to any of the assets or
properties of American, except for statutory Liens for Taxes not yet due or
payable or that are being contested in good faith;

         (g) all of the U.S. Federal income Tax Returns filed by or on behalf
of each of American and its Subsidiaries have been examined by and settled with
the Internal Revenue Service, or the statute of limitations with respect to the
relevant Tax liability expired, for all taxable periods through and including
the period ending on the date on which the Effective Time occurs;

         (h) all Taxes due with respect to any completed and settled audit,
examination or deficiency litigation with any Taxing Authority have been paid
in full;

         (i) there is no audit, examination, deficiency, or refund litigation
pending with respect to any Taxes and during the past three years no Taxing
Authority has given written notice of the commencement of any audit,
examination or deficiency litigation, with respect to any Taxes;

         (j) American is not bound by any currently effective private ruling,
closing agreement or similar agreement with any Taxing Authority relating to a
material amount of Taxes;

         (k) Except with respect to like-kind exchanges pursuant to Section
1031 of the Code, American shall not be required to include in a taxable period
ending after the Effective Time, any taxable income attributable to income that
economically accrued in a prior taxable period as a result of Section




                                     - 12 -
<PAGE>   17

481 of the Code, the installment method of accounting or any comparable
provision of state or local Tax law;

         (l) (A) no material amount of property of American is "tax exempt
property" within the meaning of Section 168(h) of the Code, (B) no material
amount of assets of American is subject to a lease under Section 7701(h) of the
Code, and (C) American is not a party to any material lease made pursuant to
Section 168(f)(8) of the Internal Revenue Code of 1954, as amended and in
effect prior to the date of enactment of the Tax Equity and Fiscal
Responsibility Act of 1982; and

         (m) immediately following the Merger, American will not have any
material amount of income or gain that has been deferred under Treasury
Regulation Section 1.1502-13, or any material excess loss account in a
Subsidiary under Treasury Regulation Section 1.1502-19.

         4.9 Employee Retirement Income Security Act of 1974.

         (a) American (which for purposes of this Section 4.9 shall include any
ERISA Affiliate) currently sponsors, maintains and contributes only to the
Plans and Benefit Arrangements set forth in Section 4.9(a) of the American
Disclosure Schedule. American has delivered or made available to Mergeparty
true, complete and correct copies of (1) each Plan and Benefit Arrangement (or,
in the case of any unwritten Plans or Benefit Arrangements, reasonable
descriptions thereof), (2) the two most recent annual reports on Form 5500
(including all schedules and attachments thereto) filed with the Internal
Revenue Service with respect to each Plan (if any such report was required by
Applicable Law), (3) the most recent summary plan description (or similar
document) for each Plan for which such a summary plan description is required
by Applicable Law or was otherwise provided to plan participants or
beneficiaries and (4) each trust agreement and insurance or annuity contract or
other funding or financing arrangement relating to any Plan. To the knowledge
of American, each such Form 5500 and each such summary plan description (or
similar document) does not, as of the date hereof, contain any material
misstatements. Except as set forth in Section 4.9(a) of the American Disclosure
Schedule, as to all Plans and Benefit Arrangements listed in Section 4.9(a) of
the American Disclosure Schedule:

                  (i) all such Plans and Benefit Arrangements comply and have
         been administered in form and in operation in accordance with their
         respective terms, and with all Applicable Laws, in all material
         respects, and American has not received any notice from any Authority
         disputing or investigating such compliance;

                  (ii) all such Plans maintained by American that are intended
         to comply with Sections 401 and 501 of the Code comply in all material
         respects with all applicable requirements of such sections, and no
         Event has occurred which is known to American which will give rise to
         disqualification of any such Plan under such sections or to a tax
         under Section 511 of the Code and each such Plan has been the subject
         of a determination letter from the Internal Revenue Service to the
         effect that such Plan and related trust is qualified and exempt from
         Federal income Taxes under Sections 401(a) and 501(a), respectively,
         of the Code; no such determination letter has been revoked, and, to
         the knowledge of American, revocation has not been threatened.
         American has delivered or made available to Mergeparty a copy of the
         most recent determination letter received with respect to each Plan
         for which such a letter has been issued, as well as a copy of any
         pending application for a determination letter. American has also
         provided or made




                                     - 13 -
<PAGE>   18

         available to Mergeparty a list of all Plan amendments as to which a
         favorable determination letter has not yet been received;

                  (iii) none of the assets of any such Plan are invested in
         employer securities or employer real property;

                  (iv) there are no Claims (other than routine Claims for
         benefits or actions seeking qualified domestic relations orders)
         pending or, to American's knowledge, threatened involving such Plans
         or the assets of such Plans, and, to American's knowledge, no facts
         exist which are reasonably likely to give rise to any such Claims
         (other than routine Claims for benefits or actions seeking qualified
         domestic relations orders);

                  (v) no such Plan is subject to Title IV of ERISA, and
         American has no actual or potential liability thereunder;

                  (vi) all group health Plans of American have been operated in
         compliance in all material respects with the group health plan
         continuation coverage requirements of COBRA;

                  (vii) neither American nor, to its knowledge, any of its
         directors, officers, employees or any other fiduciary has committed
         any breach of fiduciary responsibility imposed by ERISA or any similar
         Applicable Law that would subject American or any of its respective
         directors, officers or employees to liability under ERISA or any
         similar Applicable Law;

                  (viii) American is not and never has been a party to any
         Multiemployer Plan or made contributions to any such Plan;

                  (ix) except as set forth in the American Financial Statements
         and pursuant to the provisions of COBRA, American does not maintain
         any Plan that provides for post-retirement medical or life insurance
         benefits, and American does not have any obligation or liability with
         respect to any such Plan previously maintained by it, except as the
         provisions of COBRA may apply to any former employees or retirees of
         American;

                  (x) all material contributions to, and material payments
         from, the Plans and Benefit Arrangements that may have been required
         to be made in accordance with the terms of the Plans and Benefit
         Arrangements, and any applicable collective bargaining agreement, have
         been made. All such contributions to, and payments from, the Plans and
         Benefit Arrangements, except those payments to be made from a trust
         qualified under Section 401(a) of the Code, for any period ending
         before the Closing Date that are not yet, but will be, required to be
         made, will be properly accrued and reflected in the Closing Balance
         Sheet;

                  (xi) (1) no "prohibited transaction" (as defined in Section
         4975 of the Code or Section 406 of ERISA) has occurred that involves
         the assets of any Plan; (2) no prohibited transaction has occurred
         that could subject American, any of its employees, or, to the
         knowledge of American, a trustee, administrator or other fiduciary of
         any trust created under any Plan to the tax or sanctions on prohibited
         transactions imposed by Section 4975 of the Code or Title I of ERISA;
         (3) none of American, any of its ERISA Affiliates or, to the knowledge
         of American, any trustee, administrator or other fiduciary of any Plan
         or any agent of any of the foregoing has




                                     - 14 -
<PAGE>   19

         engaged in any transaction or acted in a manner that could, or has
         failed to act so as to, subject American or any trustee, administrator
         or other fiduciary to any liability for breach of fiduciary duty under
         ERISA or any other Applicable Law;

                  (xii) American has not incurred any material liability to a
         Plan (other than for contributions not yet due) which liability has
         not been fully paid or accrued for payment as of the date hereof;

                  (xiii) except as otherwise contemplated by this Agreement, no
         current or former employee of American will be entitled to any
         additional benefits or any acceleration of the time of payment or
         vesting of any benefits under any Plan or Benefit Arrangement as a
         result of the transactions contemplated by this Agreement;

                  (xiv) no compensation payable by American to any of its
         employees under any existing Plan, Benefit Arrangement (including by
         reason of the transactions contemplated hereby) will be subject to
         disallowance under Section 162(m) of the Code;

                  (xv) any amount that could be received (whether in cash or
         property or the vesting of property) as a result of any of the
         transactions contemplated by this Agreement by any employee, officer,
         director or independent contractor of American who is a "disqualified
         individual" (as such term is defined in proposed Treasury Regulation
         Section 1.280G-1) under any employment arrangement would not be
         characterized as an "excess parachute payment" (as such term is
         defined in Section 280G(b)(1) of the Code);

                  (xvi) no Plan which is an employee stock ownership plan (an
         "ESOP") constitutes a leveraged employee stock ownership plan within
         the meaning of Section 4975(e)(7) of the Code and there are no
         unallocated shares of stock of American currently held under any such
         ESOP in a suspense account; and

                  (xvii) there are no outstanding options (or contractual
         obligations to issue options) to acquire American Common Stock or
         other American securities other than options held by employees or
         directors of American and issued under Benefit Arrangements (the
         aggregate number of which are as set forth in Section 4.11 of the
         American Disclosure Schedule).

         (b) The execution, delivery and performance by American of this
Agreement and the Collateral Documents executed or required to be executed by
American pursuant hereto and thereto will not involve any prohibited
transaction within the meaning of ERISA or Section 4975 of the Code.

         4.10 Insurance. All material fire and casualty, general liability,
business interruption, product liability, and sprinkler and water damage
insurance policies maintained by American or any of its Subsidiaries (other
than the Tower Subsidiaries) are with reputable insurance carriers, provide
full and adequate coverage, for American and such Subsidiaries (other than the
Tower Subsidiaries) and their respective properties and assets, and are in
character and amount at least equivalent to that carried by Persons engaged in
similar businesses and subject to the same or similar perils or hazards, except
where the failure to maintain such insurance policies, either individually or
in the aggregate, would not be reasonably likely to have a Material Adverse
Effect on American.




                                     - 15 -
<PAGE>   20

         4.11 Authorized Capital Stock. The authorized and outstanding capital
stock, Option Securities and Convertible Securities of American, as of
September 18, 1997, are as set forth in Section 4.11 of the American Disclosure
Schedule.  Except as set forth in Section 4.11 of the American Disclosure
Schedule, since September 18, 1997, American has not issued any shares of
capital stock of any class, any Option Securities or any Convertible
Securities, except for the issue of American Common Stock pursuant to the
conversion of Convertible Securities or the exercise of Option Securities
outstanding on September 18, 1997 and in each case in accordance with their
present terms or as otherwise described or contemplated by the Filed American
SEC Documents. All of such outstanding capital stock has been duly authorized
and validly issued, is fully paid and nonassessable and is not subject to any
preemptive or similar rights. American has, prior to the date hereof, made
available to Mergeparty a true and correct copy of the Restated Certificate of
Incorporation of American (the "Restated Certificate") as in effect on the date
hereof. Except as set forth in Section 4.11 of the American Disclosure
Schedule, there are no bonds, debentures, notes or other indebtedness of
American outstanding having the right to vote (or convertible into, or
exchangeable for, securities having the right to vote) on any matters on which
stockholders of American may vote. Except as set forth in Section 4.11 of the
American Disclosure Schedule, or, except as set forth in the Restated
Certificate, there are no contractual obligations of American or any of its
Subsidiaries outstanding to repurchase, redeem or otherwise acquire any shares
of capital stock of American or any of its Subsidiaries. Except as contemplated
by the provisions of Section 6.20 hereof or as set forth in Section 4.11 of the
American Disclosure Schedule, there are no contractual obligations of American
to vote or to dispose of any shares of the capital stock of any of its
Subsidiaries.

         4.12 Employment Arrangements. Except as described in the Filed
American SEC Documents or in Section 4.12 of the American Disclosure Schedule,
as of the date hereof (i) none of the employees of American or any of its
Subsidiaries (other than the Tower Subsidiaries) is now, or, to American's
knowledge, since November 1, 1993 and while an employee of American or any of
its Subsidiaries has been, represented by any labor union or other employee
collective bargaining organization, or are now, or, to American's knowledge,
since November 1, 1993 have been, parties to any labor or other collective
bargaining agreement, (ii) there are, to American's knowledge, no pending labor
strikes, work stoppages, lockouts, slow downs, grievances (including unfair
labor charges), disputes or controversies with any union or any other employee
or collective bargaining organization of such employees, or threats of such
labor strikes, work stoppages, lockouts or slowdowns or any pending demands for
collective bargaining by any union or other such organization, and (iii)
neither American nor any of its Subsidiaries (other than the Tower
Subsidiaries) nor any of its or any of their employees is now, or, to
American's knowledge, since November 1, 1993 has been, subject to or involved
in or, to American's knowledge, threatened with, any union elections, petitions
therefor or other organizational or recruiting activities. American and its
Subsidiaries (other than the Tower Subsidiaries) have performed all obligations
required to be performed under all Employment Arrangements and none of them is
in breach or violation of or in default or arrears under any of the terms,
provisions or conditions thereof, except for such breaches, violations,
defaults and arrears, which either individually or in the aggregate, have not
had and are not reasonably likely to have a Material Adverse Effect on
American.

         4.13 Voting Requirements. Section 4.13 of the American Disclosure
Schedule sets forth a list of certain stockholders of American and the number
of shares of Class A Common and Class B Common owned of record by each such
stockholder as of the date hereof and the number of outstanding shares of Class
A Common Stock and/or of Class B Common Stock as of September 18, 1997. The
affirmative vote of the holders of shares of American Common Stock,
representing a majority of the outstanding




                                     - 16 -
<PAGE>   21

voting power of American Common Stock, voting as a single class (the "Required
Vote"), is the only vote necessary to approve and adopt this Agreement and the
transactions contemplated by this Agreement. As of September 18, 1997,
31,408,544 votes constituted a majority of the outstanding voting power of
American Common Stock.

         4.14 Brokers. No broker, investment banker, financial advisor or other
person, other than Credit Suisse First Boston Corporation ("CSFB"), the fees
and expenses of which will be paid by American, is entitled to any broker's,
finder's, financial advisor's or other similar fee or commission in connection
with the transactions contemplated by this Agreement. American has furnished to
Mergeparty true and complete copies of all agreements under which any such fees
or expenses may be payable and all indemnification and other agreements related
to the engagement of the persons to whom such fees may be payable.

         4.15 Information Supplied. The Information Statement will not, at the
date it is first mailed to the American stockholders (and, in the event
American shall prepare a Proxy Statement pursuant to Section 6.6 hereof, at the
time of the American Stockholders Meeting, the Proxy Statement will not)
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they are made, not
misleading. For purposes of the foregoing, the truth of any information or the
existence of any omissions at the time of any American Stockholders Meeting
shall be determined with reference to the Proxy Statement as then amended or
supplemented. The Information Statement will comply as to form in all material
respects with the requirements of the Exchange Act and the rules and
regulations thereunder.  Notwithstanding the foregoing, no representation or
warranty is made by American with respect to statements made or incorporated by
reference therein based on information supplied by Mergeparty or Mergeparty
Subsidiary including materials of Mergeparty and Mergeparty Subsidiaries
incorporated by reference in the Information Statement.

         4.16 Ordinary Course of Business. Except as may be described in the
Filed American SEC Documents or in Section 4.9(a) or Section 4.16 of the
American Disclosure Schedule and except for the Tower Merger or Tower
Distribution, as the case may be, since June 30, 1997 to the date hereof, (i)
each of American and its Subsidiaries (other than the Tower Subsidiaries) has
operated its business in the normal, usual and customary manner in the ordinary
and regular course of business, consistent with prior practice (it being
understood and agreed for purposes of this Section 4.16 by the parties that the
acquisition, disposition and exchange of radio stations is in the ordinary
course of business) and (ii) there has not been by American and its
Subsidiaries (other than the Tower Subsidiaries) (a) any declaration, setting
aside or payment of any dividend or other distribution payable in cash, stock,
property or otherwise except for (x) the payment of dividends or the making of
distributions by a direct or indirect wholly-owned Subsidiary of American and
(y) the payment of dividends on shares of American Preferred Stock in
accordance with their terms, (b) any split, combination or reclassification of
any of its capital stock or any issuance or the authorization of any issuance
of any other securities in respect of, in lieu of or in substitution for shares
of its capital stock, (c) (I) any granting to any executive officer or other
key employee of American or any of its Subsidiaries of any increase in
compensation, except for normal increases in the ordinary course of business
consistent with past practice or as required under Benefit Arrangements, (II)
any granting to any such executive officer of any increase in severance or
termination pay, except as was required under any Benefit Arrangement, (III)
except in the ordinary course, any entering into, amendment in any material
respect or termination of any Governmental Authorization, Private Authorization
or material agreement, arrangement, contract, undertaking, understanding or
other




                                     - 17 -
<PAGE>   22

obligation, or (IV) any adoption or amendment of any Plan or Benefit
Arrangement (including changing any actuarial or other assumption used to
calculate funding obligations with respect to any Plan, or changing the manner
in which contributions to any Plan are made or the basis on which such
contributions are determined) except as required to comply with changes in
Applicable Law, (d) except insofar as may have been disclosed in the Filed
American SEC Documents or required by a change in GAAP, any change in
accounting methods, principles or practices by American materially affecting
its assets, liabilities or business, (e) any sale, disposition or contract to
dispose of any of its properties or assets having a value in excess of
$1,000,000 other than in the ordinary course, and (f) any damage, destruction
or loss, whether or not covered by insurance, that has had a Material Adverse
Effect on American.

         4.17 Environmental Matters. Except as set forth in the American SEC
Documents or Section 4.17 of the American Disclosure Schedule, American:

         (a) (i) has not been notified in writing that it is potentially liable
and, has not received any written request for information or other
correspondence concerning its potential liability with respect to any site or
facility, under or pursuant to any Environmental Law, (ii) to the knowledge of
American, is not a potentially responsible party" under, the Comprehensive
Environmental Response, Compensation and "Liability Act of 1980, as amended,
the Resource Conservation and Recovery Act, as amended, or any similar state
Law, and (iii) to the knowledge of American, is not the subject of or, to the
knowledge of American, threatened with any Legal Action involving a demand for
damages or other potential liability, including any Lien, with respect to
violations or breaches of any Environmental Law;

         (b) to the knowledge of American, is in compliance with all
Environmental Laws and has obtained all Environmental Permits required under
Environmental Laws, except for such noncompliances and failures to obtain
Environmental Permits as, individually or in the aggregate, have not had and
would not be reasonably likely to have a Material Adverse Affect on American;

         (c) (i) has not entered into or received any consent decree,
compliance order or administrative order issued pursuant to any Environmental
Law, and (ii) is not a party in interest or in default under any judgment,
order, writ, injunction or decree of any Final Order issued pursuant to any
Environmental Law; and

         (d) to the knowledge of American, there have not been any releases,
spills or disposal activities of or involving Hazardous Materials, including
without limitation from underground storage tanks, on or from any property
owned, operated or leased by American which releases, spills or disposal
activities resulted or could reasonably be expected to result in investigation
and cleanup expenditures which upon payment of such expenditures would be
reasonably likely to have a Material Adverse Effect on American.

         Notwithstanding anything to the contrary contained in this Agreement,
American makes no representation or warranty with respect to its compliance
with Environmental Laws or environmental matters generally, except as
specifically set forth in this Section 4.17.

         4.18 State Takeover Statutes. Except for Section 203 of the DCL, to
American's knowledge, no other state takeover Law, statute or similar statute
or regulation applies or purports to apply to the Merger, this Agreement or any
of the transactions contemplated by this Agreement.




                                     - 18 -
<PAGE>   23

         4.19 Opinion of Financial Advisor. American has received the opinion
of CSFB, dated the date of this Agreement, to the effect that, as of such date,
the Merger Consideration to be received by the holders of American Common Stock
in the Merger is fair from a financial point of view to the holders of American
Common Stock.

         4.20 Contracts; Debt Instruments. (a) Except as set forth in Section
4.20 of the American Disclosure Schedule, neither American nor any of its
Subsidiaries is in violation of or in default under (nor does there exist any
condition which upon the passage of time or the giving of notice, or both,
would cause such a violation of or default under) any material agreement,
arrangement, contract, undertaking, understanding or other obligation,
including the American Preferred Stock ("Contracts"), to which it is a party or
by which it or any of its properties or assets is bound, except for violations
or defaults, that individually or in the aggregate, would not be reasonably
likely to have a Material Adverse Effect on American, and none of the Contracts
prohibits American from incurring an additional $1.00 of indebtedness.

         (b) American has made available to Mergeparty (i) true and correct
copies of all Contracts to which any indebtedness of American or any of its
Subsidiaries (other than the Tower Subsidiaries) in an aggregate principal
amount in excess of $1,000,000 is outstanding or may be incurred and (ii)
accurate information regarding the respective principal amounts currently
outstanding as of the date hereof thereunder.

                                   ARTICLE 5

                  REPRESENTATIONS AND WARRANTIES OF MERGEPARTY

         Except as set forth with respect to specifically identified
representations and warranties in the Mergeparty Disclosure Schedule,
Mergeparty represents and warrants to American as follows:

         5.1 Organization and Business; Power and Authority; Effect of
Transaction.

         (a) Each of Mergeparty and Mergeparty Subsidiary is a corporation duly
incorporated, validly existing and in good standing under the laws of its
jurisdiction of organization and has all requisite power and authority
(corporate and other) to own or hold under lease its properties and to conduct
its business as now conducted and as presently proposed to be conducted. Each
of Mergeparty and Mergeparty Subsidiary is duly qualified and in good standing
as a foreign corporation in each other jurisdiction (as shown on Section 5.1(a)
of the Mergeparty Disclosure Schedule) in which the character of the property
owned or leased by it or the nature of its business or operations requires such
qualification, with full power and authority (corporate and other) to carry on
the business in which it is engaged, except in such jurisdictions where the
failure to be so qualified and in good standing, individually or in the
aggregate, is not reasonably likely to have a Material Adverse Effect on
Mergeparty.

         (b) Each of Mergeparty and Mergeparty Subsidiary has all requisite
power and authority (corporate and other) to execute, deliver and perform its
obligations under this Agreement and each Collateral Document executed or
required to be executed by Mergeparty and/or Mergeparty Subsidiary pursuant
hereto or thereto or to consummate the Merger and the other transactions
contemplated hereby




                                     - 19 -
<PAGE>   24

and thereby, and the execution, delivery and performance of this Agreement and
each Collateral Document executed or required to be executed pursuant hereto
have been duly authorized by all requisite corporate or other action on the
part of Mergeparty and/or Mergeparty Subsidiary, and no other corporate
proceedings on the part of Mergeparty and/or Mergeparty Subsidiary are
necessary to authorize this Agreement or the transactions contemplated hereby
or to consummate the Merger or the other transactions so contemplated. This
Agreement has been duly executed and delivered by each of Mergeparty and
Mergeparty Subsidiary and constitutes, and each Collateral Document executed or
required to be executed pursuant hereto or to consummate the Merger when
executed and delivered by Mergeparty and/or Mergeparty Subsidiary will
constitute, a valid and binding obligation of Mergeparty and/or Mergeparty
Subsidiary, enforceable in accordance with their respective terms, except as
such enforceability may be limited by bankruptcy, moratorium, insolvency and
similar laws affecting the rights and remedies of creditors and obligations of
debtors generally and by general principles of equity. As of the date hereof,
the Boards of Directors of each of Mergeparty and Mergeparty Subsidiary, at
meetings duly called and held at which a quorum was present throughout, have
unanimously approved the Merger and this Agreement. The Board of Directors of
Mergeparty has, as the sole stockholder of Mergeparty Subsidiary, approved and
adopted this Agreement and the Merger, and the transactions contemplated
hereby.

         (c) At the time of execution of this Agreement, Mergeparty and all of
its Affiliates or "associates" (as defined in the Exchange Act) collectively
beneficially own less than 5% of the outstanding shares of American Common
Stock.

         (d) The execution, delivery and performance by each of Mergeparty
and/or Mergeparty Subsidiary of this Agreement and any Collateral Document
executed or required to be executed by such party pursuant hereto or thereto,
do not, and the consummation by Mergeparty Subsidiary of the Merger and the
other transactions hereby and thereby and compliance with the terms, conditions
and provisions hereof or thereof by Mergeparty and/or Mergeparty Subsidiary
will not:

                  (i) (A) conflict with, or result in a breach or violation of,
         or constitute a default under, any Organic Document of Mergeparty or
         Mergeparty Subsidiary or (B) any Applicable Law applicable to
         Mergeparty or Mergeparty Subsidiary, or conflict with, or result in a
         breach or violation of, or constitute a default under, or permit the
         termination, cancellation or acceleration of any obligation or
         liability in, or but for any requirement of the giving of notice or
         passage of time or both would constitute such a conflict with, breach
         or violation of, or default under, or permit any such termination,
         cancellation or acceleration of, any Contract or Private Authorization
         of Mergeparty or Mergeparty Subsidiary, except, in the case of clause
         (B), for such conflicts, breaches, violations, terminations,
         cancellations or accelerations that would not, individually or in the
         aggregate, be reasonably likely to have a Material Adverse Effect on
         Mergeparty; or

                  (ii) result in or permit the creation or imposition of any
         Lien upon any property now owned or leased by Mergeparty or Mergeparty
         Subsidiary except for such Liens that would not, individually or in
         the aggregate, be reasonably likely to have a Material Adverse Effect
         on Mergeparty or Mergeparty Subsidiary; or

                  (iii) require any Governmental Authorization or Governmental
         Filing except for (A) the FCC Consents, (B) filings under the
         Hart-Scott-Rodino Act, (C) the filing with the




                                     - 20 -
<PAGE>   25

         Commission of such reports under Section 13(a) or 15(d) of the
         Exchange Act as may be required in connection with this Agreement and
         the transactions contemplated by this Agreement, (D) the filing of the
         Certificate of Merger with the Delaware Secretary of State and
         appropriate documents with the relevant authorities of other states in
         which American is qualified to do business and (E) such other
         Governmental Authorizations and Governmental Filings the failure of
         which to be made or obtained would, individually or in the aggregate,
         not be reasonably likely to have a Material Adverse Effect on
         American.

         (e) Mergeparty Subsidiary was formed solely for the purpose of
engaging in the transactions contemplated by this Agreement and has not engaged
in any business activities or conducted any operations other than in connection
with the transactions contemplated by this Agreement.

         5.2 Compliance with Governmental Authorizations and Applicable Law;
Litigation. Except as disclosed in any report or other document filed by
Mergeparty with the SEC prior to the date hereof or in Section 5.2 of the
Mergeparty Disclosure Schedule, there are no Legal Actions pending or, to the
knowledge of Mergeparty, threatened against Mergeparty or any of its
Subsidiaries, except for Legal Actions that, individually or in the aggregate,
would not be reasonably likely to have a Material Adverse Effect on Mergeparty
or prevent or materially burden or materially impair the ability of Mergeparty
to consummate the transactions contemplated by this Agreement. Except as set
forth in Section 5.2 of the Mergeparty Disclosure Schedule, there are not facts
relating to Mergeparty (or any Affiliate thereof) under the FCA that would
disqualify it (or any Affiliate or assignee) from obtaining control of the
American FCC Licenses or that would prevent it (or any Affiliate or assignee)
from consummating the transactions contemplated by this Agreement or, to
Mergeparty's knowledge, materially delay the grant of the FCC Consents. Except
as may be set forth in Section 5.2 of the Mergeparty Disclosure Schedule, it is
not necessary for Mergeparty or any of its Subsidiaries or other Affiliates (or
assigns) to (a) seek or obtain any waiver from the FCC, (b) dispose of any
interest in any media or communications property or interest (including without
limitation any of the American Stations or the American Brokered Stations), (c)
terminate any venture or arrangement, or (d) effectuate any change or
restructuring of ownership (including without limitation the removal or
withdrawal of officers or directors or the conversion or repurchase of equity
securities in Mergeparty or any Affiliate) to obtain, or to avoid any delay in
obtaining, the FCC Consents. Mergeparty is able to certify on an FCC Form 315
that it is financially qualified.

         5.3 Opinion of Financial Advisor. The Board of Directors of Mergeparty
has received the opinion of Chase Securities Inc., dated the date of this
Agreement, to the effect that, as of such date, the aggregate Merger
Consideration to be paid by Mergeparty is fair to Mergeparty from a financial
point of view.

         5.4 Mergeparty Financing. On the Closing Date, Mergeparty will have
sufficient funds to consummate the transactions contemplated by this Agreement,
including without limitation the Merger, and to pay all related fees and
expenses.




                                     - 21 -
<PAGE>   26

                                   ARTICLE 6

                                   COVENANTS

         6.1 Access to Information; Confidentiality. American shall afford to
Mergeparty and its accountants, counsel, investment bankers, financial advisors
and other agents and representatives (the "Representatives") full access during
normal business hours throughout the period prior to the Closing Date to all of
its (and its Subsidiaries', other than those of the Tower Subsidiaries)
properties, books, contracts, commitments and records (including without
limitation Tax Returns) and, during such period, shall furnish promptly upon
request (i) a copy of each report, schedule and other document filed or
received by it pursuant to the requirements of any Applicable Law (including
without limitation the FCA) or filed by it or any of its Subsidiaries (other
than the Tower Subsidiaries) with any Authority in connection with the Merger
or which may have a material effect on it or its business, financial condition
or results of operations, and (ii) such other information concerning any of the
foregoing as Mergeparty shall reasonably request; provided, however, that the
foregoing shall not require American to permit any disclosure or to disclose
any information, that in the reasonable judgment of American would result in
the disclosure of any trade secrets of third parties or violate any of its
obligations with respect to confidentiality if American shall have used its
best efforts to obtain the consent of such third party to such inspections or
disclosure. All requests for information shall be directed to an executive
officer of American or such other Persons as may be designated by American. All
information disclosed pursuant to this Section or otherwise shall be governed
by the terms of the Confidentiality Agreement, the terms and provisions of
which are incorporated herein by reference with the same force and effect as
though set forth here in their entirety. No investigation pursuant to this
Section or otherwise shall affect any representation or warranty of American in
this Agreement or any condition to the obligations of Mergeparty hereto.

         6.2 Agreement to Cooperate.

         (a) Upon the terms and subject to the conditions set forth in this
Agreement, each of the parties hereto shall use best efforts (x) to take, or
cause to be taken, all actions and to do, or cause to be done, all things
necessary, proper or advisable to consummate the Merger and the Tower Merger or
Tower Disposition, as the case may be, and (y) to refrain from taking, or cause
to be taken, any action and to refrain from doing or causing to be done, any
thing which could impede or impair the consummation of the Merger and the Tower
Merger or Tower Distribution, as the case may be, including, in all cases,
without limitation using its best efforts (i) to prepare and file with the
applicable Authorities as promptly as practicable after the execution of this
Agreement all requisite applications and amendments thereto, together with
related information, data and exhibits, necessary to request issuance of orders
approving the Merger by all such applicable Authorities, (ii) to obtain all
necessary or appropriate waivers, consents and approvals, (iii) to effect all
necessary registrations, filings and submissions, (iv) to defend any suit,
action or proceeding, whether judicial or administrative, challenging the
Merger or any of the transactions contemplated by the Merger Agreement,
including seeking to lift any injunction or other legal bar to the Merger (and,
in such case, to proceed with the Merger as expeditiously as possible), and (v)
to obtain the satisfaction of the conditions specified in Article 7, including
without limitation the securing of all authorizations, consents, waivers,
modifications, order or approvals referred to in Sections 7.1(b) and 7.1(d).




                                     - 22 -
<PAGE>   27

         (b) Without limiting the generality of the foregoing, the parties
acknowledge and agree that the transfer of control of the American FCC Licenses
as contemplated by this Agreement is subject to the prior consent and approval
of the FCC. Within twenty (20) business days following the date of this
Agreement, American and Mergeparty shall file with the FCC appropriate
applications requesting the FCC's written consent to the transfer of control of
the American FCC Licenses pursuant to this Agreement and have caused all
necessary persons to join in one or more such applications filed with the FCC
(the "Applications"). American and Mergeparty will use their best efforts to
take such steps as may be necessary (i) diligently to prosecute the
Applications and to prepare and file any further Applications or amendments as
may be necessary to obtain the consent for the transfer of control to
Mergeparty of the licenses held by the American Brokered Stations to be
acquired by American and (ii) to obtain the FCC Consents, including action by
Mergeparty, at its sole cost and expense (except as provided elsewhere in this
Agreement), to satisfy or cause to be removed all Divestiture Conditions, if
any. The failure by American or Mergeparty to use its best efforts to timely
file or diligently prosecute its portion of any Application or, in the case of
Mergeparty, the failure to use its best efforts to make any Required
Divestiture or otherwise satisfy or cause to be removed all Divestiture
Conditions on or before the Termination Date, shall be a material breach by
American or Mergeparty, as the case may be, of this Agreement. American agrees
that any delay in prosecuting the Applications or obtaining the FCC Consents
resulting from Mergeparty's good faith negotiations, subject to Applicable Law,
with the FCC, Antitrust Division or FTC with respect to the imposition of a
Divestiture Condition shall not constitute a failure by Mergeparty to use its
best efforts diligently to prosecute the Applications or obtain the FCC
Consents and so long as such negotiations do not interfere with satisfaction of
all conditions to Closing prior to the Termination Date. If reconsideration or
judicial review is sought with respect to any FCC Consent, American and
Mergeparty shall (promptly and with all due efforts) oppose such efforts to
obtain reconsideration or judicial review.

         (c) Without limiting the generality of Section 6.2(a), the parties
undertake and agree to file as soon as practicable after the date hereof, and
in any event within ten (10) business days hereof, a Notification and Report
Form under the Hart-Scott-Rodino Act with the Federal Trade Commission (the
"FTC") and the Antitrust Division of the Department of Justice (the "Antitrust
Division"). Each of the parties shall (i) use its best efforts to comply as
expeditiously as possible with all lawful requests of the FTC or the Antitrust
Division for additional information and documents and (ii) not extend any
waiting period under the Hart-Scott-Rodino Act or enter into any agreement with
the FTC or the Antitrust Division not to consummate the transactions
contemplated by this Agreement, except with the prior written consent of the
other party hereto; provided, however, that nothing shall limit the ability of
Mergeparty to extend the 20-day waiting period under the Hart-Scott-Rodino Act
following substantial compliance with any request for additional information
that may be forthcoming, if such extension is reasonably necessary to allow the
continuation of good-faith negotiations intended to remove any objection to the
transaction that the FTC or Antitrust Division may have asserted, and if such
extension will expire not less than 30 days prior to the Termination Date.

         (d) Anything in this Agreement, including without limitation Section
6.2(b), to the contrary notwithstanding, Mergeparty shall obtain the FCC
Consents and clearances under the Hart-Scott-Rodino Act and the grant of any
waivers in connection therewith prior to the Termination Date in accordance
with this Agreement unless the failure to obtain such FCC Consents, clearances
and waivers is primarily the result of one or more Uncontrollable Events. For
purposes of this Agreement, the term "Uncontrollable Events" shall mean (i)
acts or omissions on the part of American or any of its Subsidiaries in
conducting its respective operations other than those relating to the number of
American




                                     - 23 -
<PAGE>   28

FCC Licenses or amount of revenues in a particular market, (ii) an unremedied
or unwaived material breach by American of its obligations under this
Agreement, or (iii) any change in or enactment of Applicable Law by Congress
and signed by the President and which (A) has the effect of decreasing the
number of radio licenses which a Person may own nationally or locally or (B)
materially and adversely relates to the concentration of radio licenses which a
Person may own in a market, and as a result of the change or enactment referred
to in either clause (A) or (B) above, Mergeparty's performance of its
obligations under this Agreement would have a Material Adverse Effect on
Mergeparty's radio and television broadcasting business. Mergeparty shall file
with the FCC, within sufficient time to permit timely grant of the
Applications, applications for consent to assign or transfer, pursuant to trust
arrangements satisfying the FCC's local multiple ownership rules and policies,
such radio broadcast stations as Mergeparty may designate, so that the radio
broadcast stations of Mergeparty and American not designated for such trust
arrangements may be held by the Surviving Corporation in compliance with the
FCC's local multiple ownership rules and policies. Mergeparty shall, to the
extent necessary to obtain grant of the trust applications, thereafter promptly
file or cause to be filed any further applications (including applications to
assign radio broadcast stations to third party purchasers for value) that may
be required by the FCC.  Notwithstanding the two preceding sentences, with
regard to stations located in the San Jose market, the obligations of
Mergeparty to submit trust or sale applications shall be excused for such
stations to the extent and for the duration of the period that Mergeparty is
unable to identify the stations to be placed in trust or sold because of the
failure of American to notify Mergeparty of the resolution of the Antitrust
Division impediment impacting the American transactions pending in the San Jose
market.

         (e) If Mergeparty or any of its Affiliates receives an administrative
or other order or notification relating to any violation or claimed violation
of the rules and regulations of the FCC, or of any other Authority (including
without limitation seeking or relating to a Divestiture Condition), that could
affect Mergeparty's or Mergeparty Subsidiary's ability to consummate the
transactions contemplated hereby, or if Mergeparty or any other Affiliate of
Mergeparty should become aware of any fact relating to the qualifications of
Mergeparty or any of its Affiliates that reasonably could be expected to cause
the FCC to withhold its consent to the assignment of the American FCC Licenses,
Mergeparty shall promptly notify American thereof and American shall do
likewise with Mergeparty and Mergeparty shall use its best efforts, and take
such steps as are necessary, in order to satisfy or remove the Divestiture
Conditions to enable the Closing to occur prior to the Termination Date.
Mergeparty covenants and agrees to keep American fully informed as to all
matters concerning all Required Divestitures and shall promptly notify American
in writing of any and all significant developments relating thereto and
American agrees to do likewise with Mergeparty.

         (f) Mergeparty acknowledges and agrees that certain of the American
Stations and American Brokered Stations may file applications for renewal of
license during the time that an application for the FCC Consents is pending
before the FCC. To the extent any such application for renewal may be filed,
Mergeparty agrees to amend the transferee's portion of any application for the
FCC Consents and, as may be required, to amend any license renewal applications
for all of the American Stations or American Brokered Stations, to confirm
Mergeparty's intention to consummate this Agreement during the pendency of such
license renewal application, and to agree to assume the consequences associated
with succeeding to the place of American in such license renewal applications.
The making of this statement shall not be deemed to limit or waive any other
rights that Mergeparty may otherwise have under this Agreement.




                                     - 24 -
<PAGE>   29

         (g) The parties shall cooperate with one another in the preparation,
execution and filing of all Tax Returns, questionnaires, applications, or other
documents regarding any real property transfer or gains, sales, use, transfer,
value added, stock transfer and stamp Taxes, any transfer, recording,
registration and other fees, and any similar Taxes which become payable in
connection with the Merger that are required or permitted to be filed on or
before the Closing Date.

         (h) Subject to Applicable Laws relating to the exchange of
information, American, on the one hand, and Mergeparty, on the other hand,
shall have the right to review in advance, and to the extent practicable each
will consult the other with respect to, all the information relating to
American or Mergeparty, as the case may be, and any of their respective
Subsidiaries, that appear in any filing made with, or written materials
submitted to, any Authority and/or other Person in connection with the Merger
and the other transactions contemplated by this Agreement. In exercising the
foregoing right, each of American and Mergeparty shall act reasonably and as
promptly as practicable.

         6.3 Public Announcements. Until the Closing, or in the event of
termination of this Agreement, each party shall consult with the other before
issuing any press release or otherwise making any public statements with
respect to this Agreement or the Merger and shall not issue any such press
release or make any such public statement without the prior consent of the
other.  Notwithstanding the foregoing, the parties acknowledge and agree that
they may, without each other's prior consent, issue such press releases or make
such public statements as may be required by Applicable Law, in which case, to
the extent practicable, they will consult with the other regarding the nature,
content and form of such press release or public statement.

         6.4 Notification of Certain Matters. Each party shall give prompt
notice to the other, of the occurrence or non-occurrence of any Event the
occurrence or non-occurrence of which would be reasonably likely to cause (i)
any representation or warranty made by it contained in this Agreement to be
untrue or inaccurate in any material respect or (ii) any failure made by it to
comply with or satisfy, or be able to comply with or satisfy, in any material
respect, any covenant, condition or agreement to be complied with or satisfied
by it under this Agreement in any material respect, such that, in any such
case, one or more of the conditions of Closing would not be satisfied;
provided, however, that the delivery of any notice pursuant to this Section
shall not limit or otherwise affect the rights and remedies available hereunder
to the party receiving such notice or the obligations of the party delivering
such notice and shall not, in any event, affect the representations,
warranties, covenants and agreements of the parties or the conditions to their
respective obligations under this Agreement.

         6.5 Stockholder Approval. If, after the date hereof, approval and
adoption of this Agreement shall be required by the American stockholders under
Applicable Law (the "American Stockholder Approval"), American will, as soon as
practicable following the date thereof, establish a record date (which will be
as soon as practicable following the date hereof) for, duly call, give notice
of, convene and hold a meeting of its stockholders (the "American Stockholders
Meeting") for the purpose of obtaining the American Stockholder Approval.
American will, through its Board of Directors, recommend to its stockholders
approval and adoption of this Agreement, subject to the fiduciary duties of the
Board of Directors of American under Applicable Law. American shall, if it
desires in its sole and absolute discretion, also submit for the approval of
its stockholders at the meeting of stockholders referred to in this Section
6.5, the Tower Merger, the Tower Distribution or an Alternative Transaction, as
the case may be, and, through its Board of Directors, recommend to its
stockholders approval of an agreement




                                     - 25 -
<PAGE>   30

contemplating the Tower Merger, the Tower Distribution or an Alternative
Transaction, as the case may be, and approval of such transaction.

         6.6 Information Statement.

         (a) In the event the American Stockholders Meeting is not required
because Mergeparty shall have delivered to American valid written consents of
stockholders constituting the Required Vote, then American shall prepare and
file with the Commission as soon as is reasonably practicable after the date
hereof an information statement (the "Information Statement") complying with
applicable rules and regulations of the Commission and the DCL. Mergeparty and
American shall promptly furnish to the other all information, and take such
other actions, as may reasonably be requested in connection with any action
taken to comply with the provisions of this Section 6.6.

         (b) Each of American and Mergeparty shall correct promptly any
information provided by it to be used specifically in the Information Statement
that shall have become false or misleading in any material respect and shall
take all steps necessary to file with the Commission and have cleared by the
Commission any amendment or supplement to the Information Statement so as to
correct such Information Statement and cause it to be disseminated to the
stockholders of American, to the extent required by Applicable Law. Without
limiting the generality of the foregoing, American shall notify Mergeparty
promptly of the receipt of the comments of the Commission and of any request by
the Commission for amendments or supplements to the Information Statement, or
for additional information, and shall supply Mergeparty with copies of all
correspondence between it or its representatives, on the one hand, and the
Commission or members of its staff, on the other hand, with respect to the
Information Statement. Whenever any event occurs which should be described in
an amendment or a supplement to the Information Statement, American shall, upon
learning of such event, promptly prepare, file and clear with the Commission
and mail to the stockholders of American such amendment or supplement;
provided, however, that, prior to such mailing, (i) American shall consult with
Mergeparty with respect to such amendment or supplement, (ii) shall afford
Mergeparty reasonable opportunity to comment thereon, and (iii) each such
amendment or supplement shall be reasonably satisfactory to Mergeparty.

         (c) In the event American shall be required to call the American
Stockholders Meeting pursuant to Section 6.5 hereof, all references to the
Information Statement in this Agreement shall be deemed to be references to the
Proxy Statement.

         6.7 Miscellaneous. Nothing contained in this Agreement shall prohibit
American from (a) taking and disclosing to its stockholders a position
contemplated by Rules 14d-9 and 14e-2(a) promulgated under the Exchange Act or
(b) making any disclosure to American's stockholders if, in the good faith
judgment of the majority of the members of the Board of Directors of American,
after consultation with independent counsel, failure to so disclose would be
inconsistent with Applicable Laws.

         6.8 Option Plans.

         (a) With respect to each unexpired option to purchase American Common
Stock that is outstanding immediately prior to the Tower Merger or Tower
Distribution, as applicable (each, an "American Option") which is held by
employees or directors of American or any of its Subsidiaries (each, an
"Optionholder") immediately prior to the Tower Merger or the Tower
Distribution, as the case may be, American shall, or shall cause American Tower
to, hold in escrow the consideration that the




                                     - 26 -
<PAGE>   31

Optionholder would have received in connection with the Tower Merger or the
Tower Distribution, as applicable, had the Optionholder exercised such American
Option and held the American Common Stock received upon exercise thereof
through the record date of the Tower Merger or Tower Distribution, as
applicable (the "Tower Consideration"). The Tower Consideration shall be held
in escrow by American or, in its sole and absolute discretion, a reputable
financial institution, pending the consummation of the Merger. Notwithstanding
the terms of any Benefit Arrangement or any agreement evidencing the grant of
an American Option to the contrary, no adjustment will be made to the American
Options (including, but not limited to, the exercise price or number of shares
of American Common Stock subject to an American Option) in respect of the Tower
Merger or Tower Distribution, as applicable, except as provided in this Section
6.8.

         (b) All American Options outstanding immediately prior to the
Effective Time, except as provided otherwise in this Section 6.8, will be
canceled by American and will be converted into the right to receive the Merger
Consideration. At the Effective Time, each Optionholder shall receive, with
respect to each unexpired American Option of the Optionholder so canceled by
American, solely (x) the Tower Consideration held in escrow pursuant to Section
6.8(a) above, plus (y) an amount in cash equal to the Merger Consideration
reduced by the exercise price of the American Option. Except as provided in the
preceding sentence, no other consideration will be paid by American to an
Optionholder in respect of his or her canceled American Options. If the Merger
is not consummated, the cancellation of the Optionholder's American Options
shall be rescinded and the Optionholder shall continue to hold such American
Options upon their original terms and conditions. At the election of any
Optionholder who is a "disqualified individual" (as such term is defined in
proposed Treasury Regulation Section 1.280G-1), this Section 6.8(b) will be
inoperative with respect to such American Options as he or she may specify to
the extent that the acceleration, vesting cancellation and cash-out of American
Options at the Effective Time as provided herein would constitute an "excess
parachute payment" (as such term is defined in Section 280G(b)(1) of the Code).
Any Optionholder who makes such election shall forfeit the American Options
which are subject to such election and shall receive no consideration therefor.

         (c) With respect to American Options held by Tower Employees,
notwithstanding the foregoing provisions of this Section 6.8 and in lieu
thereof, and subject to the approval of the provisions of this Section 6.8 by
the Board of Directors of American and the Compensation Committee thereof, such
Tower Employees may elect to have their American Options assumed by American
Tower and converted into options to acquire Tower Common Stock as of the
effective time of the Tower Merger or Tower Distribution, as the case may be,
such conversion to be effectuated in a manner that will preserve the spread in
such American Options between the option exercise price and the fair market
value of American Common Stock and the ratio of the spread to the exercise
price prior to such conversion and, to the extent applicable, otherwise in
conformity with the rules under Section 424(a) of the Code and the regulations
promulgated thereunder.

         (d) American will use its best efforts (including best efforts to
obtain any consents of Optionholders, if required) to cause the cancellation of
all of the American Options immediately prior to the Effective Time.

         (e) Notwithstanding the foregoing provisions of this Section 6.8, in
the event that any amount payable under Section 6.8(b) to an Optionholder in
respect of his American Options would fail to be deductible by American (or any
successor thereto) solely by reason of Section 162(m) of the Code (after taking
into account all amounts paid or reasonably expected to be payable to the
Optionholder in the same




                                     - 27 -
<PAGE>   32
taxable year in which the payments under Section 6.8(b) are made to the
Optionholder and which are not otherwise exempt from Code Section 162(m) in
determining whether any amount payable to the Optionholder will fail to be
deductible thereunder), then, with respect to such portion of the Optionholder's
American Options the cancellation and cash-out of which would be nondeductible
under said Section 162(m) (the "Section 162(m) Options"), such Section 162(m)
Options shall be canceled in accordance with the foregoing provisions of this
Section 6.8, but the payments of the Tower Consideration and other cash
consideration contemplated in Section 6.8(b) hereof in respect of the
Optionholder's Section 162(m) Options shall be made to the Optionholder on the
110th day following the Effective Time. American shall use its best efforts to
obtain the written consent of each Optionholder affected by this Section 6.8(e)
to the foregoing provisions hereof.

         (f) All amounts payable hereunder to an Optionholder shall be reduced
by any applicable withholding taxes.

             Notwithstanding anything to the contrary in this Agreement,
American shall have the right, in its sole and absolute discretion, to
accelerate, on such terms and conditions as it shall determine, in whole or in
part, the vesting of any or all of the American Options outstanding on the date
hereof so that such American Options are exercisable in full prior to the
Effective Date.

         6.9 Conduct of Business by Mergeparty Pending the Merger. Except as
otherwise contemplated by this Agreement, or as has been publicly disclosed
prior to the date hereof, after the date hereof and prior to the Closing Date
or earlier termination of this Agreement unless American shall otherwise agree
in writing, with respect to Mergeparty's media business, Mergeparty shall, and
shall cause its Subsidiaries, to:

                  (i) conduct their respective businesses in the ordinary and
         usual course of business and consistent with past practice, which
         includes the acquisition of other radio broadcasting stations;

                  (ii) not amend or propose to amend its Organic Documents in
         any manner materially adverse to the holders of the American Preferred
         Stock;

                  (iii) use all best efforts to preserve intact their
         respective business organizations and goodwill, keep available the
         services of their respective present officers and key employees, and
         preserve the goodwill and business relationships with customers and
         others having business relationships with them and not engage in any
         action, directly or indirectly, with the intent to adversely affect
         the transactions contemplated by this Agreement; and

                  (iv) not authorize or enter into any agreement that would
violate any of the foregoing.

         6.10 Conduct of Business by American Pending the Merger. Except as set
forth in Section 6.10 of the American Disclosure Schedule or as otherwise
contemplated by this Agreement, including without limitation the transactions
contemplated by the Tower Documentation and Section 6.19 hereof, after the date
hereof and prior to the Closing Date or earlier termination of this Agreement,
unless Mergeparty shall otherwise consent in writing, American shall, and shall
cause its Subsidiaries, to:




                                     - 28 -
<PAGE>   33

                  (i) conduct their respective businesses in the ordinary and
         usual course of business and consistent with past practice;

                  (ii) not (A) amend or propose to amend their respective
         Organic Documents, (B) split, combine or reclassify (whether by stock
         dividend or otherwise) their outstanding capital stock or issue or
         authorize the issuance of any other securities in respect of, in lieu
         of, or in substitution for shares of its capital stock, or (C)
         declare, set aside or pay any dividend or distribution payable in
         cash, stock, property or otherwise, except for (x) the payment of
         dividends or the making of distributions by a direct or indirect
         wholly-owned Subsidiary of American and (y) the payment of dividends
         on shares of the American Preferred Stock in accordance with their
         terms;

                  (iii) not issue, sell, pledge or dispose of, or agree to
         issue, sell, pledge or dispose of, any shares of American Stock,
         Convertible Securities or Option Securities, except that American may
         issue shares of American Common Stock upon conversion of Convertible
         Securities and exercise of Option Securities outstanding on the date
         hereof and in accordance with their present terms, including any
         adjustment to the conversion price of Convertible Securities as a
         result of the Tower Distribution or Tower Merger;

                  (iv) not (A) incur or become contingently liable with respect
         to any indebtedness other than (x) short-term borrowings not to exceed
         $25 million in the aggregate outstanding at any one time, (y)
         borrowings to finance pending acquisitions of radio stations set forth
         in Section 6.10 of the American Disclosure Schedule and, pursuant to
         agreements in effect on the date hereof and (z) borrowings not to
         exceed $120 million to finance a capital contribution by American to
         Tower, (B) redeem, purchase, acquire or offer to purchase or acquire
         any shares of its capital stock, Convertible Securities or Option
         Securities, except pursuant to the conversion or exercise thereof, as
         the case may be, or except to the extent required by the present terms
         thereof, (C) sell, lease, license, pledge, dispose of or encumber any
         properties or assets or sell any businesses other than pursuant to
         agreements in effect on the date hereof and set forth in Section 6.10
         of the American Disclosure Schedule or Liens arising in accordance
         with the provisions of indebtedness in effect on the date hereof and
         in accordance with their present terms, or (D) make any loans,
         advances or capital contributions to, or investments in, any other
         Person, other than to any direct or indirect wholly owned Subsidiary
         of American (other than the Tower Subsidiaries) and, except as
         provided in clause (z) above, or to officers and employees of American
         or any of its Subsidiaries for travel, business or relocation expenses
         in the ordinary course of business;

                  (v) use all reasonable efforts to preserve intact their
         respective business organizations and goodwill, keep available the
         services of their respective present officers and key employees, and
         preserve the goodwill and business relationships with customers and
         others having business relationships with them and not engage in any
         action, directly or indirectly, with the intent to adversely impact
         the transactions contemplated by this Agreement;

                  (vi) confer on a regular and frequent basis with one or more
         representatives of Mergeparty to report material operational matters
         and the general status of ongoing operations;




                                     - 29 -
<PAGE>   34

                  (vii) not adopt, enter into, amend or terminate any
         employment, severance, special pay arrangement with respect to
         termination of employment or other similar arrangements or agreements
         with any directors, officers or key employees;

                  (viii) maintain with financially responsible insurance
         companies insurance on their respective tangible assets and their
         respective businesses in such amounts and against such risks and
         losses as are consistent with past practice;

                  (ix) not make any Tax election that could reasonably be
         likely to have a Material Adverse Effect on American or settle or
         compromise any material income Tax liability;

                  (x) except in the ordinary course of business or except as
         would not reasonably be likely to have a Material Adverse Effect on
         American, not modify, amend or terminate any Material Agreement to
         which American or any Subsidiary is a party or waive, release or
         assign any material rights or claims thereunder;

                  (xi) not make any material change to its accounting methods,
         principles or practices, except as may be required by GAAP;

                  (xii) not acquire or agree to acquire (x) by merging or
         consolidating with, or by purchasing a substantial portion of the
         assets of, or by any other manner, any business or any Person or other
         business organization or division thereof or (y) any assets that,
         individually or in the aggregate, are material to American and its
         Subsidiaries taken as a whole, in each case, other than pursuant to
         agreements in effect on the date hereof and set forth in the Section
         6.10 of the American Disclosure Schedule (Mergeparty agrees not to
         unreasonably withhold, delay or condition a consent to any matters
         described in this paragraph);

                  (xiii) except as set forth in Section 4.9(a) or Section 4.16
         of the American Disclosure Schedule, (a) not grant to any executive
         officer or other key employee of American or any of its Subsidiaries
         any increase in compensation, except for normal increases in the
         ordinary course of business consistent with past practice or as
         required under Benefit Arrangements in effect as of June 30, 1997, (b)
         not grant to any such executive officer any increase in severance or
         termination pay, except as was required under any Benefit Arrangements
         in effect as of June 30, 1997, or (c) not adopt or amend any Plan or
         Benefit Arrangement (including change any actuarial or other
         assumption used to calculate funding obligations with respect to any
         Plan, or change the manner in which contributions to any Plan are made
         or the basis on which such contributions are determined) and (d)
         except in the ordinary course, not enter into, amend in any material
         respect or terminate any Governmental Authorization (except as would
         not be reasonably likely to have a Material Adverse Effect on
         American), material Private Authorization or Contract; and

                  (xiv) not authorize or enter into any agreement that would
         violate any of the foregoing.

Anything in this Section to the contrary notwithstanding, the provisions of
this Section shall not apply to any of the Tower Subsidiaries.

         6.11 Control of Operations. Nothing contained in this Agreement shall
give to Mergeparty, directly or indirectly, rights to control or direct
American's operations prior to the Effective Time. Prior




                                     - 30 -
<PAGE>   35

to the Effective Time, American shall exercise, consistent with the terms and
conditions of this Agreement, complete control and supervision of its
operations. Nothing contained in this Agreement shall give to American,
directly or indirectly, rights to control or direct Mergeparty's operations
prior to the Effective Time. Prior to the Effective Time, Mergeparty shall
exercise, consistent with the terms and conditions of this Agreement, complete
control and supervision of its operations.

         6.12 Directors', Officers' and Employees' Indemnification and
Insurance.

         (a) The Organic Documents of the Surviving Corporation shall contain
provisions no less favorable with respect to indemnification than are set forth
in the Organic Documents of American, as in effect on the date hereof, which
provisions shall not be amended, repealed or otherwise modified for a period of
six (6) years from the Effective Time in any manner that would affect adversely
the rights thereunder of individuals who at any time prior to the Effective
Time were directors, officers or employees of American or any of its
Subsidiaries, unless such modification shall be required by Applicable Law.

         (b) From and after the Effective Time, Mergeparty shall indemnify,
defend and hold harmless the present and former officers, directors and
employees of American or any of its Subsidiaries (collectively, the
"Indemnified Parties") against all losses, expenses, claims, damages,
liabilities or amounts that are paid in settlement of, or otherwise in
connection with any claim, action, suit, proceeding or investigation (as used
in this Section, a "claim"), based in whole or in part on the fact that the
Indemnified Party (or the Person controlled by the Indemnified Party) is or was
a director, officer or employee of American or any of its Subsidiaries and
arising out of actions or omissions occurring at or prior to the Effective Time
(including, without limitation, in connection with this Agreement, the Merger,
the Tower Merger or Tower Distribution, as the case may be, and the
transactions contemplated hereby), whether asserted or claimed prior to, at or
after the Effective Time, in each case to the fullest extent permitted under
the DCL (and shall pay any expenses, as incurred, in advance of the final
disposition of any such action or proceeding to each Indemnified Party to the
fullest extent permitted under the DCL). Without limiting the foregoing, in the
event any such claim is brought against any of the Indemnified Parties, (i)
such Indemnified Parties may retain counsel (including local counsel)
satisfactory to them and which shall be reasonably satisfactory to Mergeparty
and they shall pay all reasonable fees and expenses of such counsel for such
Indemnified Parties; and (ii) Mergeparty shall use its best efforts to assist
in the defense of any such claim; provided, however, that Mergeparty shall not
be liable for any settlement effected without its written consent, which
consent shall not be unreasonably withheld, delayed or conditioned.
Notwithstanding the foregoing, nothing contained in this Section shall be
deemed to grant any right to any Indemnified Party which is not permitted to be
granted to an officer, director or employee of Mergeparty under the DCL,
assuming for such purposes that Mergeparty's Organic Documents provide for the
maximum indemnification permitted by the DCL.

         (c) Mergeparty will cause to be maintained for a period of not less
than six (6) years from the Effective Time American's current directors' and
officers' insurance and indemnification policy to the extent that it provides
coverage for events occurring prior to the Effective Time ("D&O Insurance") for
all Persons who are directors and officers of American on the date of this
Agreement, so long as the annual premium therefor would not be in excess of
200% of the last annual premium therefor paid prior to the date of this
Agreement (the "Maximum Premium"); provided, however, that if the annual
premiums of such insurance coverage exceed such amount, Mergeparty shall only
be obligated to obtain the greatest coverage available under such policy for a
cost not exceeding such amount, provided further,




                                     - 31 -
<PAGE>   36

however, that Mergeparty may, in lieu of maintaining such existing D&O
Insurance as provided above, cause coverage to be provided under any policy
maintained for the benefit of Mergeparty or any of its Subsidiaries, so long as
the terms thereof are no less advantageous to the intended beneficiaries
thereof than the existing D&O Insurance. If the existing D&O Insurance expires,
is terminated or canceled during such six-year period, Mergeparty will use its
best efforts to cause to be obtained as much D&O Insurance as can be obtained
for the remainder of such period for an annualized premium not in excess of the
Maximum Premium, on terms and conditions no less advantageous to the covered
Persons than the existing D&O Insurance. American represents to Mergeparty that
the Maximum Premium is not greater than $500,000.

         (d) In the event Mergeparty or Mergeparty Subsidiary or any of their
respective successors or assigns (i) consolidates with or merges into any other
person and shall not be the continuing or surviving corporation or entity of
such consolidation or merger or (ii) transfers all or substantially all of its
properties and assets to any person, then and in each such case, proper
provisions shall be made so that the successors and assigns of Mergeparty or
Mergeparty Subsidiary, as the case may be, shall assume the obligations set
forth in this Section.

         (e) This Section is intended to be for the benefit of, and shall be
enforceable by, the Indemnified Parties, their heirs and personal
representatives and shall be binding on Mergeparty, Mergeparty Subsidiary and
their respective successors and assigns.

         6.13 Solicitation of Employees. If this Agreement is terminated,
Mergeparty agrees that neither it nor any of its Subsidiaries or other
Affiliates will, for a period of eighteen (18) months from the date of such
termination, solicit or actively seek to hire any key employees (including
without limitation any station manager, sales manager, program director or any
individual senior to any of such individuals) who during such period is
employed by American or any of its Subsidiaries, whether or not such individual
would commit breach of such individual's employment agreement or contact in
leaving such employment; provided, however, that the foregoing shall not
prevent Mergeparty from taking any action permitted by the Confidentiality
Agreement.

         6.14 Change of Name. Within ten (10) days after the Closing,
Mergeparty shall cause each of its Subsidiaries, if necessary, to file
certificates of amendment with the appropriate Secretary of State, amending
such company's Organic Documents to change the name of such company to any name
which does not include the words "American Radio". Immediately prior to the
Closing, American will assign to American Tower or its designee all right,
title and interest, including all the good will related thereto, in and for
past infringements of the name "American Radio" and related trademarks, service
marks, logos and the like. As soon as commercially practicable, but in no event
later than six (6) months from the Closing Date, Mergeparty Subsidiary and its
Subsidiaries shall cease all use of the name "American Radio" in all modes.

         6.15 Benefit Plans. Mergeparty shall take such action as may be
necessary so that on and after the Effective Time and for one (1) year
thereafter, officers and employees of American and its Subsidiaries (other than
Tower Employees) shall be provided employee benefits, plans and programs
(excluding equity incentive arrangements) which are no less favorable in the
aggregate than those generally available to those employee benefit plans and
programs in effect for such officers and employees immediately prior to the
Effective Time; it being understood that Mergeparty shall determine the types
and levels of specific benefits to be so provided. For purposes of eligibility
to participate and




                                     - 32 -
<PAGE>   37

vesting in all benefits provided to directors, officers and employees of
American and its Subsidiaries (other than Tower Employees), such directors,
officers and employees of American and its Subsidiaries will be credited with
their years of service with American and its Subsidiaries and prior employers
to the extent service with American and its Subsidiaries and prior employers is
taken into account under the applicable plans of American and its Subsidiaries
as in effect as of the date hereof. Upon termination of any health plan of
American or any of its Subsidiaries, individuals who were directors, officers
or employees of American or its Subsidiaries at the Effective Time (other than
Tower Employees) shall if employed by Mergeparty or its Subsidiaries become
eligible to participate in such health plans as may be established or
maintained by Mergeparty or its Subsidiaries to the extent that such
individuals were eligible to participate in the applicable health plan of
American or its Subsidiaries immediately prior to the Effective Time. Amounts
paid during the calendar year in which the Effective Time occurs, but before
the Effective Time, by directors, officers and employees of American and its
Subsidiaries (other than Tower Employees) under any health plans of American
shall after the Effective Time be taken into account in applying deductible and
out-of-pocket limits applicable under the health plans of Mergeparty or its
Subsidiaries provided during such calendar year to the same extent as if such
amounts had been paid under such health plans of Mergeparty or its Subsidiaries
and Mergeparty shall cause to be waived under its health plans any pre-existing
conditions as of the date of termination of the American health plan and
eligibility to participate in such health plan to the extent such conditions
would be waived under the applicable plans of American and its Subsidiaries as
in effect on the date hereof. Nothing in this Agreement shall be construed as
granting to any employee of American or its Subsidiaries any rights of
continuing employment.

         6.16 American Cumulative Preferred Stock. To the extent permitted
under Contracts, pursuant to which any indebtedness for money borrowed of
American or any of its Subsidiaries is outstanding as of the date hereof and by
the American Preferred Stock, American shall pay all interest in respect of the
American Cumulative Preferred Stock in cash.

         6.17 American Tower Transaction. Prior to the Closing and subject to
Section 2.8 hereof, American shall consummate the Tower Merger or the Tower
Distribution pursuant to the Tower Documentation or, to the extent contemplated
hereby, the Alternative Transaction. As soon as practicable following the
execution of this Agreement and in any event prior to the consummation of the
Tower Merger or the Tower Distribution, as the case may be, American shall
prepare, in consultation with Mergeparty and its counsel, the definitive
documentation to be executed by American and American Tower to effect the Tower
Merger or the Tower Distribution, as the case may be; and submit such
documentation to Mergeparty for its approval, which approval shall not be
unreasonably withheld, delayed or conditioned (as approved, the "Tower
Documentation"), and American and American Tower shall execute and deliver the
Tower Documentation in the form so approved. Mergeparty and American agree that
the Tower Documentation shall include or be prepared on a basis consistent with
the following:

         (a) American Tower or American Tower Sub, as applicable, shall
indemnify, defend and hold American and its Subsidiaries (other than the Tower
Subsidiaries, collectively in this Section the "American Tower Group") harmless
from and against any liabilities (other than income tax liabilities) to which
American or any of its Subsidiaries (other than the American Tower Group) may
be or become subject that relate to or arise from the assets, business,
operations, debts or liabilities of the American Tower Group, including without
limitation (i) the assets to be transferred to American Tower pursuant to
Section 6.17(g), (ii) liabilities to be assumed by any member of the American
Tower Group as contemplated herein, whether arising prior to, concurrent with
or after the Tower Merger or the Tower




                                     - 33 -
<PAGE>   38

Distribution, as the case may be, (iii) liabilities relating to or arising from
any untrue statement or alleged untrue statements of a material fact contained
in the Information Statement or in any document filed or required to be filed
in connection with the Tower Merger or the Tower Distribution, or any omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, but in each case only
with respect to information provided by or relating to the American Tower
Group, (iv) any economic impact related to or arising from the failure to
obtain any Governmental Authorizations, Private Authorizations or other third
party consents, or to make any Governmental Filings, necessary to consummate
the Tower Merger or the Tower Distribution, as the case may be, and (v) the
rental and related expenses for the relevant portion of the leased premises
located at 116 Huntington Avenue, Boston, Massachusetts in the event of the
failure to obtain the landlord's consent to the assignment of the obligations
relating to, or sublease of, such relevant portion of such premises.

         (b) American shall indemnify, defend and hold the American Tower Group
harmless from and against any liabilities (other than income tax liabilities)
to which the American Tower Group may be or become subject that relate to or
arise from the assets, business, operations, debts or liabilities of American
or its Subsidiaries (other than the American Tower Group) whether arising prior
to, concurrent with or after the Tower Merger or the Tower Distribution, as the
case may be.

         (c) The Tower Documentation shall include an agreement that addresses
issues of the allocation of Tax liabilities and deconsolidation of American and
the American Tower Group which shall contain principles to the following
effect:

                  (i) The tax sharing agreement among members of the American
         Tower Group and American and its other Subsidiaries shall be
         terminated as of the effective date of the Tower Merger (the "Tower
         Merger Date") or of the Tower Distribution (the "Tower Distribution
         Date"), as the case may be, and will have no further effect for any
         taxable year (whether the current year, a future year, or a past
         year).

                  (ii) American shall include the income of the American Tower
         Group (including any deferred income triggered into income by Reg.
         Section .1.1502-13 and Reg. Section .1.1502-14 and any excess loss
         accounts taken into income under Reg. Section .1.1502-19) on American's
         consolidated federal income Tax returns and consolidated or combined
         state and local income Tax returns to the extent such income is
         properly includible thereon for all periods through the Tower Merger
         Date or the Tower Distribution Date, as the case may be, and pay any
         income Taxes attributable to such income. American Tower shall
         reimburse American for any such federal, state and local income Taxes
         payable by the American Tax Group attributable to such income, as
         determined on a separate company basis; provided, however, that
         American Tower shall have no reimbursement obligation if American has
         no income Tax liability on a consolidated basis as a result of a net
         operating loss or to the extent that the income of the American Tower
         Group is offset by a net operating loss under the principles of clause
         6.17(c)(v). The American Tower Group will furnish Tax information to
         American for inclusion in American's federal consolidated income Tax
         return for the period which includes the Tower Merger Date or the Tower
         Distribution Date, as the case may be, in accordance with American
         Tower's past custom and practice. The income of the American Tower
         Group will be apportioned to the period up to and including the Tower
         Merger Date or the Tower Distribution Date, as the case may be, and the
         period after the Tower Merger




                                     - 34 -
<PAGE>   39

         Date or the Tower Distribution Date, as the case may be, by closing
         the books of the American Tower Group as of the end of such date.

                  (iii) American Tower shall indemnify the American Tax Group
         and Mergeparty for all Taxes imposed by any Taxing Authority on any
         member of the American Tax Group or on Mergeparty (or on any member of
         its consolidated tax group) as a result of or in connection with the
         sale or transfer of assets to the American Tower Group pursuant to
         Section 6.17(g) (or between members of the American Tax Group prior to
         the final transfer to a member of the American Tower Group), and the
         Tower Merger or the Tower Distribution, as the case may be, including
         without limitation any Taxes on any gain to any member of the American
         Tax Group arising under Section 311 of the Code, any Taxes on any
         deferred gain to any member of the American Tax Group triggered as a
         result of or upon any such event, any gain attributable to any excess
         loss account triggered upon any such event, any taxes arising as a
         result of an election under Section 336(e) of the Code made at the
         request of the American Tower Group as provided in clause
         6.17(c)(xii), and any transfer Taxes arising from any such event;
         provided that such indemnity shall only apply to the extent that the
         additional liability for such Taxes payable by the American Tax Group
         as a consequence of such events (on a "but for" basis) exceeds
         $20,000,000.

                  (iv) If as a result of any payment by American Tower to any
         member of the American Tax Group or to Mergeparty pursuant to this
         Section 6.17(c) (including this clause (iv)) Mergeparty (or any member
         of its consolidated group for Federal income tax purposes) or any
         member of the American Tax Group becomes liable in any taxable year to
         pay any Taxes in excess of the Taxes they would have owed in the
         absence of any such payment by American Tower, American Tower will
         indemnify such Person for such Tax liability and make such Person
         whole on an after-tax basis for such Tax liability.

                  (v) For the purposes of clauses 6.17(c)(ii) and (iii), net
         operating losses of the American Tax Group shall be reduced and deemed
         absorbed in the following order for each taxable year of the American
         Tax Group: first, by all income unrelated to the transactions
         contemplated by this Agreement of members of the American Tax Group
         other than members of the American Tower Group for the entire
         applicable taxable year of the American Tax Group; second, by income
         of the American Tower Group described in clause 6.17(c)(ii); and
         third, by income of the American Tax Group described in Section
         6.17(c)(iii).  Mergeparty shall have no claim under either Section
         6.17(c)(ii) or (iii) for additional Tax liability arising in
         subsequent taxable years solely as a result of the absorption of net
         operating losses of the American Tax Group in this manner.

                  (vi) American shall control any audit or contest relating to
         Taxes attributable to the American Tax Group. To the extent such audit
         or contest relates to Taxes that American Tower is obligated to
         reimburse or indemnify American under this agreement, American shall
         (x) regularly consult with American Tower in connection with such
         audit or contest; (y) provide American Tower with periodic reports on
         the status of such audit or contest; and (z) not enter into a
         settlement agreement relating to such audit or contest that materially
         prejudices American Tower without American Tower's consent.

                  (vii) If pursuant to any Tax audit or contest there is an
         adjustment to any Taxes that are reimbursable or indemnifiable by the
         American Tower Group to any member of the American




                                     - 35 -
<PAGE>   40

         Tax Group under this Agreement, including clauses 6.17(c)(ii), (iii)
         and (iv), then (x) any additional Taxes imposed on the American Tax
         Group as a result of such adjustment shall be indemnified by the
         American Tower Group; and (y) any refund of Taxes paid to the American
         Tax Group as a result of such adjustment of amounts previously
         indemnified by American Tower shall be promptly paid over to American
         Tower (including additional amounts to make American Tower whole on an
         after-Tax basis, not exceeding amounts previously paid by American
         Tower Group with regard to such Taxes).

                  (viii) American Tower shall not have the right to any refund,
         credit (or other reduction) of Taxes realized by the American Tax
         Group resulting from a carry back of a post-acquisition Tax attribute
         of any of the American Tower Group into a Tax Return filed by the
         American Tax Group.

                  (ix) American Tower, American and Mergeparty agree to attempt
         in good faith to mutually agree on such terms as promptly as
         practicable after the date hereof. If American Tower, American and
         Mergeparty cannot agree on such terms, then any disagreement shall be
         resolved by an arbitrator jointly selected by American Tower, American
         and Mergeparty. The arbitrator shall be a law or accounting firm
         nationally recognized in tax matters. The costs of such arbitration
         shall be shared equally by American Tower and American. The decision
         of the arbitrator shall be binding on all parties.

                  (x) American shall not elect to retain any net operating loss
         carryovers or capital loss carryovers of the American Tower Group.

                  (xi) The indemnities of the American Tower Group described in
         this Section 6.17(c) shall apply to all applicable Taxes whenever they
         shall arise.

                  (xii) At the request of any member of the American Tower
         Group, American agrees that it shall, and shall cause its Subsidiaries
         or other appropriate Affiliates to, make and/or cooperate with members
         of the American Tower Group in making an election under Section 336(e)
         of the Code with respect to the Tower Merger or the Tower
         Distribution, as the case may be.

         (d) The Tower Documentation shall provide for the registration under
applicable federal and state securities laws of the securities of American
Tower Sub to be issued in the Tower Merger or the securities of American Tower
to be issued in the Tower Distribution, as the case may be, and upon the
exercise of the American Options if such registration is either required under
Applicable Law or would otherwise be required to cause such securities to be
freely transferable by Persons not Affiliates of American Tower, and customary
representations and warranties regarding information contained in filings made
with the Commission or any other Authority in connection with the Tower Merger
or the Tower Distribution, as the case may be. The Tower Documentation shall
provide for an amendment to the American Tower or American Tower Subsidiary
certificate of incorporation to establish an authorized capitalization and
other terms similar to American's and the authority of the Board of Directors
of American Tower or American Tower Subsidiary, as the case may be, to
establish stock plans or issue stock or other securities of such entities or
rights thereto.

         (e) The Tower Documentation shall provide that American shall obtain
all Governmental Authorizations, Private Authorizations or other third party
consents, and make any necessary




                                     - 36 -
<PAGE>   41

Governmental Filings, necessary to consummate the Tower Merger or Tower
Distribution, as the case may be, except where the failure to obtain such
consents, in the aggregate, would not (i) be reasonably likely to have any
adverse effect on American, (ii) materially impair the ability of American to
perform its obligations under this Agreement or the Tower Documentation, or
(iii) materially delay or prevent the consummation of the Merger or the Tower
Merger or the Tower Distribution, as the case may be. The Tower Documentation
shall provide that the Tower Merger or the Tower Distribution, as the case may
be, shall be done in compliance with American's certificate of incorporation
and by-laws and in material compliance with all Applicable Laws.

         (f) At the time of the Tower Merger or the Tower Distribution, as the
case may be, a member of the American Tower Group shall assume (i) to the
extent permitted by the landlord, the obligations under the lease of 116
Huntington Avenue, Boston, Massachusetts, with respect to the relevant portion
of such leased premises or, if such permission is not obtained, sublease such
relevant portion, and (ii) all liabilities with respect to which
indemnification is provided under Section 6.17(a). American shall cause all
members of the American Tower Group to be released from all other liabilities;
provided, that, American Tower agrees to reimburse American for any expenses
incurred in obtaining such Release. American and its Subsidiaries (other than
the American Tower Group) shall release the American Tower Group from all
Claims by American or its Subsidiaries (other than the American Tower Group),
and the American Tower Group shall release American and its other Subsidiaries
from all Claims by the American Tower Group, in each case except for Claims
arising from or attributable to the transactions contemplated by this Agreement
or any Collateral Document or otherwise asserted prior to the Effective Time.

         (g) Except as otherwise provided by Section 6.19, American shall, or
shall cause its Subsidiaries to, as applicable, contribute, transfer or convey
to American Tower the assets described in Section 6.17 of the American
Disclosure Schedule, and American Tower shall assume all of American's and such
Subsidiaries' obligations with respect to such assets to the extent so set
forth.

         (h) The Tower Documentation shall not include any representations or
warranties by American or American Tower relating to the business, operations,
assets, debts or liabilities of American and its Subsidiaries (other than the
American Tower Group) or the American Tower Group.

         (i) On the Closing Date, the employees of American listed in Section
6.17 of the American Disclosure Schedule (the "Tower Employees") shall be
offered full-time employment by American Tower or one of its Subsidiaries. If
the Tower Merger or Tower Distribution occurs prior to the Closing Date, such
employees shall continue to be employed by American (at American's expense),
but shall devote such time as deemed reasonably necessary, consistent with
their obligations to American, in support of the conduct of the Tower Business
by the American Tower Group on a basis consistent with the time and scope of
services that such employees devoted and provided to the Tower Business prior
to the Tower Merger or Tower Distribution, as the case may be. Effective
immediately prior to the Effective Time, American Tower shall assume all
obligations arising under any Plan or Benefit Arrangement between American or
any of its Subsidiaries and the Tower Employees other than the rights, if any,
of the Tower Employees with respect to the American Options (which are being
satisfied by American as provided in Section 6.8) and all existing rights to
indemnification.  Such assumption agreement shall provide that American and its
Subsidiaries, effective as of the Effective Time (or effective as of the Tower
Merger Date or the Tower Distribution Date, as the case may be, as to any
member of the Tower Employees that devotes substantially all of his or her
business time to the Tower Business) shall be




                                     - 37 -
<PAGE>   42

indemnified by American Tower from all obligations arising under such
employment agreements or arrangements (except in respect of the American
Options and all existing rights to indemnification). For a period of eighteen
(18) months following the consummation of the Tower Merger or the Tower
Distribution, as the case may be, members of the American Tower Group shall not
actively solicit or seek to hire any employees of American or its Subsidiaries
not currently engaged in the Tower Business, other than the Tower Employees, it
being understood and agreed that such agreement shall not be deemed to prevent
members of the American Tower Group from placing general advertisements in
publications or on the Internet or soliciting any such employee who (i)
initiates employment discussions with a member of the American Tower Group or
(ii) is not employed by American or Mergeparty or any of their respective
Subsidiaries on the date such a member first solicits such employee.

         (j) Anything in this Section or elsewhere in this Agreement to the
contrary notwithstanding, (i) any references in this Section or elsewhere in
this Agreement to Tower Merger shall in the event American elects to pursue the
Tower Distribution be deemed to refer to the Tower Distribution, and (ii) any
references in this Section or elsewhere in this Agreement to Tower Distribution
shall in the event American elects to pursue the Tower Merger be deemed to
refer to the Tower Merger.

         (k) In the event that at any time prior to the Effective Time American
desires to effect a disposition of the American Tower Group (or all or
substantially all its assets), other than pursuant to the Tower Merger or the
Tower Distribution (an "Alternative Transaction"), Mergeparty agrees to
cooperate with American with respect thereto and to make any appropriate
modifications to this Agreement and any Collateral Documents relating to such
transaction, provided that such transaction does not adversely affect the net
economic benefits of the transactions contemplated hereby or by the Collateral
Documents to Mergeparty (or, if it does, the American Tower Group or the Entity
acquiring it (or all or substantially all its assets) indemnifies American with
respect thereto) and provided further that the American Tower Group or the
Entity acquiring the American Tower Group (or all or substantially all its
assets) will have substantially the same obligations to Mergeparty as American
Tower Group would have pursuant to the Merger Agreement and the Collateral
Documents and that such Entity shall be no less financially able to meet such
obligations than American Tower.

         (l) At the request of American Tower and subject to the requirements
and restrictions imposed on American by any of its financing documents (as from
time to time amended), American shall, from time to time after the date hereof
and prior to the Tower Merger Date or the Tower Distribution Date, as the case
may be, permit American Tower to (i) acquire (whether by merger, stock or asset
acquisition or otherwise) additional businesses engaged in the business in
which American Tower is engaged, (ii) construct additional communication
towers, or (iii) make other capital improvements on assets owned or leased by
American Tower or its Subsidiaries, and in each such case make additional
capital contributions in American Tower, or make loan to American Tower, of the
funds.

         (m) Notwithstanding anything in this Agreement to the contrary, the
consummation of the transactions contemplated by this Section and in the Tower
Documentation or any action or inaction taken in furtherance thereof shall not
be deemed to be a breach of any covenant, agreement, warrant or representation
of American contained in this Agreement.

         (n) The indemnification obligations referred to in this Section shall
survive the Tower Merger Date or the Tower Distribution Date, as the case may
be.




                                     - 38 -
<PAGE>   43

         (o) The Tower Documentation shall provide that prior to the Tower
Merger Date or the Tower Distribution Date, as the case may be, American shall
amend (i) its Section 401(k) Plan to permit a transfer of the assets held
thereunder for the benefit of the Tower Employees to a Section 401(k) Plan to
be established by American Tower and, prior to the Tower Merger or Tower
Distribution Date, as the case may be, such assets will be so transferred
(along with any outstanding qualified domestic relations orders and loans) and
(ii) any other Benefit Plan arrangements with respect to Tower Employees to
reflect the Tower Merger or the Tower Distribution, as the case may be.

         (p) The Tower Documentation shall provide that prior to the Effective
Time American shall, to the extent requested by Mergeparty, cause the American
Tower Group to perform its obligations under the Tower Documentation.

         (q) In the event the Tower Merger or Tower Distribution, as the case
may be, is to be consummated within 24 hours prior to the Effective Time,
Mergeparty shall, at the written request of American in its sole and absolute
discretion, immediately prior to the Tower Merger or Tower Distribution, as the
case may be, and subject to the satisfaction of all of the conditions to the
consummation of the transactions contemplated hereby, purchase, at their then
fair market value, shares of a new class of American preferred stock that
constitutes "Junior Securities" (as defined in the American Cumulative
Preferred Stock) in an amount (which shall not in the aggregate exceed
$200,000,000) necessary to enable American to consummate the Tower Merger or
Tower Distribution, as the case may be, without causing any conflict with, or
breach or violation of, or default under, or creating any right to accelerate
any obligation or liability in, or causing or creating any of the foregoing
after the giving of notice or passage of time or both with, of, under or in any
indebtedness of American or the American Cumulative Preferred Stock; provided,
however, that anything in this Section or elsewhere in this Agreement to the
contrary notwithstanding, in such event such preferred stock shall remain
outstanding immediately following the Effective Time.

         In the event American desires, in its sole and absolute discretion, to
consummate the Tower Merger or Tower Distribution, as the case may be, more
than twenty-four (24) hours prior to the Effective Time, American shall be free
to sell preferred stock to a third party to enable it to consummate the Tower
Merger or the Tower Distribution, provided that the terms of such preferred
stock shall provide that it is redeemable, at the option of American, at par
immediately following the Effective Time and provided further that American
Tower shall hold American harmless against the net expenses incurred by it in
connection with such sale and issuance of preferred stock.

         Notwithstanding anything to the contrary in this Agreement, American
will not consummate the Tower Merger or Tower Distribution if, on a pro forma
basis after giving effect thereto, the fair value and present fair saleable
value of American's assets would not exceed American's stated liabilities and
identified contingent liabilities, American would not be able to pay its debts
as they become absolute and mature, or American's remaining capital would be
unreasonably small for the business in which it is engaged.

         6.18 Purchase Price Adjustment. (a) Within 90 days after the Closing
Date, Mergeparty shall prepare and deliver to American Tower (in the event that
the Tower Distribution has been consummated) or American Tower Sub (in the
event that Tower Merger has been consummated), as applicable (the "Tower
Entity") (i) a consolidated balance sheet (the "Closing Balance Sheet") of
American and its Subsidiaries (other than the Tower Subsidiaries) (the
"Post-Closing American Group"), prepared from the




                                     - 39 -
<PAGE>   44

books and records of the Post-Closing American Group, and (ii) a statement (the
"Closing Statement") setting forth (A) Working Capital (as defined below) as of
the Effective Time ("Closing Working Capital") and (B) Net Debt (as defined
below) as of the Effective Time ("Closing Net Debt"), together with a
certificate of Mergeparty's chief financial officer that the Closing Statement
has been prepared in accordance with this Section 6.18.

         During the 45-day period following the Tower Entity's receipt of the
Closing Statement, the Tower Entity shall be permitted to review (and make
copies of) the working papers of Mergeparty relating to the Closing Statement.
The Closing Statement shall become final and binding upon the parties on the
forty-sixth day following delivery thereof, unless the Tower Entity gives
written notice of its disagreement with the Closing Statement ("Notice of
Disagreement") to Mergeparty prior to such date. Any Notice of Disagreement
shall (i) specify in reasonable detail the nature of any disagreement so
asserted, (ii) only include disagreements based on Closing Working Capital or
Closing Net Debt (or the components thereof) not being calculated in accordance
with this Section 6.18 and (iii) be accompanied by a certificate of the Tower
Entity's chief financial officer that he or she concurs with each of the
positions taken by the Tower Entity in the Notice of Disagreement. If a Notice
of Disagreement is received by Mergeparty in a timely manner, then the Closing
Statement (as revised in accordance with clause (A) or (B) below) shall become
final and binding on the earlier of (A) the date Mergeparty and the Tower
Entity resolve in writing any differences they have with respect to the matters
specified in the Notice of Disagreement or (B) the date any disputed matters
are finally resolved in writing by the Accounting Firm (as defined below).

         During the 30-day period following delivery of a Notice of
Disagreement, Mergeparty and the Tower Entity shall seek in good faith to
resolve in writing any differences which they may have with respect to the
matters specified in the Notice of Disagreement. During such period Mergeparty
shall have access to (and shall be permitted to make copies of) the working
papers of the Tower Entity prepared in connection with the Notice of
Disagreement. At the end of such 30-day period, Mergeparty and the Tower Entity
shall submit to an independent accounting firm (the "Accounting Firm") for
review and resolution any and all matters which remain in dispute and which
were properly included in the Notice of Disagreement and each of Mergeparty and
Tower Entity shall submit a memorandum setting forth in reasonable detail the
basis for its positions. The Accounting Firm shall be a nationally recognized
independent public accounting firm agreed upon by Mergeparty and the Tower
Entity in writing. Mergeparty and the Tower Entity shall jointly use all
reasonable efforts to cause the Accounting Firm to render a decision within
thirty (30) days following submission or as promptly thereafter as is
practicable. Mergeparty and the Tower Entity agree that judgment may be entered
upon the determination of the Accounting Firm in any court having jurisdiction
over the party against which such determination is to be enforced. The cost of
any dispute resolution (including the fees and expenses of the Accounting Firm
and reasonable attorney fees and expenses of the parties) pursuant to this
Section 6.18 shall be borne by Mergeparty and the Tower Entity in inverse
proportion as they may prevail on matters resolved by the Accounting Firm,
which proportionate allocations shall also be determined by the Accounting Firm
at the time the determination of the Accounting Firm is rendered on the merits
of the matters submitted.

         (b) Subject to Section 6.18(d), if Closing Working Capital is less
than (i) $60,000,000 in the event the Closing Date is on or prior to March 31,
1998 or (ii) $70,000,000 in the event the Closing Date is after March 31, 1998
(the "WC Amount"), the Tower Entity shall, and if Closing Working Capital is
greater than the WC Amount, Mergeparty shall, owe the other the amount of such
difference. The term "Working Capital" shall mean Current Assets minus
Liabilities (in each case as defined below). The




                                     - 40 -
<PAGE>   45

terms "Current Assets" and "Liabilities" shall mean the current assets and
liabilities of the Post-Closing American Group calculated in accordance with
GAAP except that (i) outstanding principal amount of indebtedness and
liquidation preference of preferred stock shall be excluded, (ii) cash shall be
excluded, (iii) accruals for Taxes shall be included except that (A) Tax
liabilities relating to the Tower Merger or Tower Distribution, Tax benefits
arising from the exercise or cancellation of options between the date of this
Agreement and the Effective Time and deferred income Tax assets and liabilities
that exist or arise from differences in basis for Tax and financial reporting
purposes attributable to acquisitions, exchanges and dispositions or
attributable to depreciation and amortization shall not be taken into account
and (B) accruals for Taxes relating to acquisitions, exchanges or dispositions
shall be determined in accordance with American's past accounting practices,
(iv) Current Assets shall be increased by an amount equal to the sum of (x) the
amount derived by multiplying $44.00 by the number of shares of American Common
Stock held in its treasury as of the Effective Date and (y) the aggregate
amount of the spread of $44.00 over the exercise price of each American Option
outstanding on the date hereof terminated or cancelled prior to the Effective
Time or for which the holder has elected to receive an option to acquire Tower
Common Stock in lieu thereof, less the Tax benefit that would have been
received with respect to the exercise of such options, (v) Current Assets shall
be (A) increased (if the number of shares of American Common Stock issuable
upon conversion of the American Convertible Preferred Stock is fewer than
3,750,000) by an amount equal to the amount derived by multiplying $44.00 by
the excess of (I) 3,750,000 less (II) the number of shares of American Common
Stock issuable upon conversion of the American Convertible Preferred Stock or
(B) decreased (if the number of shares of American Common Stock issuable upon
conversion of the American Convertible Preferred Stock is greater than
3,750,000) by an amount equal to the amount derived by multiplying $44.00 by
the excess of (I) the number of shares of American Common Stock issuable upon
conversion of the American Convertible Preferred Stock less (II) 3,750,000 and
(vi) liabilities from the radio broadcasting rights contracts for St. Louis
Rams games shall be limited to $3,300,000.

         (c) Subject to Section 6.18(d), if Closing Net Debt is greater than
the Debt Amount (as defined below) minus $50,419,000, minus cash received by
the Post-Closing American Group in respect of options exercised between the
date of this Agreement and the Effective Time (the "CD Amount"), the Tower
Entity shall, and if Closing Net Debt is less than the CD Amount, Mergeparty
shall, owe the other the amount of such difference. "Debt Amount" shall mean
$1,066,721,000, minus the consideration that was expected to be paid (as set
forth on Section 6.10(a) of the American Disclosure Schedule) with respect to
all acquisitions set forth in Section 6.10(a) of the American Disclosure
Schedule which were not consummated prior to the Closing Date, plus the
consideration that was expected to be received (as set forth in Section 6.10(a)
of the American Disclosure Schedule) with respect to all dispositions set forth
in Section 6.10(a) of the American Disclosure Schedule which were not
consummated prior to the Closing Date, plus the consideration paid in
connection with acquisitions consummated prior to the Closing Date which were
not listed in Section 6.10(a) of the American Disclosure Schedule, minus the
consideration received in connection with dispositions consummated prior to the
Closing Date which were not listed in Section 6.10(a) of the American
Disclosure Schedule. The term "Net Debt" shall mean outstanding principal
amount of indebtedness (including, without duplication, guarantees of
indebtedness) plus outstanding liquidation preference of all preferred stock
(other than the American Convertible Preferred Stock) minus cash.

         (d) Amounts owed pursuant to the first sentence of Section 6.18(c) and
the first sentence of 6.18(c) shall be aggregated or netted, as appropriate
(the resulting amount, the "Adjustment Amount"). In the event that the
Adjustment Amount minus $10,000,000 is greater than $0 (the "Final Adjustment




                                     - 41 -
<PAGE>   46

Amount"), the party that owes the Final Adjustment Amount shall make payment by
wire transfer of immediately available funds of the Final Adjustment Amount
together with interest thereon at a rate of interest equal to the lesser of (i)
10% per annum and (ii) if the Tower Entity is being charged a rate of interest
by a financial institution, such rate, but in not event lower than the prime
rate as reported in the Wall Street Journal on the date the Closing Statement
becomes final and binding on the parties, calculated on the basis of the actual
number of days elapsed divided by 365, from the date of the Effective Time to
the date of actual payment.

         (e) The scope of the disputes to be resolved by the Accounting Firm is
limited to whether the Closing Statement was prepared in compliance with the
requirements of this Section 6.18 and the allocation of the costs of dispute
resolution, and the Accounting Firm is not to make any other determination.

         (f) During the period of time from and after the delivery of the
Closing Statement to the Tower Entity through the date the Closing Statement
becomes final and binding on Mergeparty, American and the Tower Entity,
Mergeparty shall cause the Post-Closing American Group to afford to the Tower
Entity and any accountants, counsel or financial advisors retained by the Tower
Entity in connection with the adjustment contemplated by this Section 6.18
reasonable access (with the right to make copies) during normal business hours
to the books and records of the Post-Closing American Group to the extent
relevant to the adjustment contemplated by this Section 6.18.

         (g) Any adjustment pursuant to this Section 6.18 shall be taken into
account in the calculation of Tax liability pursuant to clause 6.17(c)(iii),
and any increase or decrease in the amount of Taxes that are reimbursable or
indemnifiable by the American Tower Group as a result of any such adjustment
shall be treated as an adjustment to Taxes for purposes of clause 6.17(c)(vii)

         6.19 Tower Leases. In connection with the Tower Merger, Tower
Distribution or any Alternative Transaction, as the case may be, Mergeparty and
American shall agree on the definitive documentation ("Tower Leases") to be
executed by American and American Tower with respect to certain broadcasting
towers set forth in Section 6.17(i) the American Disclosure Schedules
("Towers"). The markets in which such Towers, are located and the annual
"market price" for each antenna are set forth in Exhibit "B." Except as set
forth in Section 6.17(I) of the American Disclosure Schedule, such Towers are
now owned or leased by American and shall become the property of American
Tower. Each of the Tower Leases shall contain standard and customary terms and
conditions and Mergeparty and American specifically agree to the inclusion of
the following in each of the Tower Leases:

         (a) except as provided in clause (b) below with respect to those Tower
Leases set forth in Section 6.19 of the American Disclosure Schedule, each
Tower Lease shall be for a term of twenty (20) years with four (4) renewal
periods of five (5) years each; each such renewal to be upon the same terms and
conditions as the original Tower Lease.

         (b) Prior to the Effective time, American shall use its best efforts
to extend the term of each lease set forth in Section 6.19 of the American
Disclosure Schedule ("Land Leases") to a minimum duration of twenty (20) years,
inclusive of renewal periods, if any, and provide Mergeparty with respect to
the Towers subject to the extended Land Leases, tower leases with the
equivalent benefits set forth in clauses (c), (d) and (e) and for a minimum
duration of twenty (20) years ("Extended Tower Leases"). With respect to any
such Land Lease that is not so extended (except with respect to the Land Lease
for




                                     - 42 -
<PAGE>   47

KUFX(FM), which present term of approximately eighteen (18) remaining years
shall be deemed to satisfy the foregoing requirement of a minimum duration of
twenty (20) years), American, American Tower and Mergeparty shall negotiate in
good faith to agree upon definitive documentation to provide Mergeparty with
respect to the Towers subject to such Land Leases, tower leases with the
benefits equivalent of such Extended Tower Leases or mutually agreed to
alternative arrangements providing equivalent value to Mergeparty.

         (c) each Tower Lease shall provide that no payments shall be payable
by Mergeparty for a period of three (3) years from the Effective Time; for the
next three (3) years the payments shall be as follows: one-third (1/3) of the
market price as set forth in Exhibit B corresponding to each FM antenna (or
AM/FM antenna) for year four (4); two-thirds (2/3) for year five (5) and full
market price for year six (6); thereafter, for the balance of the term and any
renewals thereof, the payments shall be the market price, together with an
annual increase every year, beginning for year seven (7), of the lesser of five
percent (5%) or the Consumer Price Index for all Urban Consumers over the
previous year's payments (except with respect to San Jose (KUFX) and Boston
(WNFT) which such payments shall begin at the Effective Time, with respect to
Mergeparty, and will begin on January 1, 1998 as between American and American
Tower).  Notwithstanding the foregoing, Mergeparty acknowledges that Tower
Lease payments at the full "market price" indicated on Exhibit B by American to
American tower may commence upon such leases becoming the property of American
Tower and shall continue until the Effective Time.

         (d) all expenses for taxes, insurance, maintenance and utilities in
respect of each Tower shall be paid by American Tower.

         (e) American Tower will assume the obligation and responsibility for
complying with all Applicable Law with respect to the Towers.

                                   ARTICLE 7

                               CLOSING CONDITIONS

         7.1 Conditions to Obligations of Each Party to Effect the Merger. The
respective obligations of each party to effect the Merger shall, except as
hereinafter provided in this Section, be subject to the satisfaction at or
prior to the Closing Date of the following conditions, any or all of which may
be waived, in whole or in part, to the extent permitted by Applicable Law:

         (a) in the event American shall be required to call the American
Stockholders Meeting pursuant to Section 6.5 hereof, the American Stockholder
Approval shall have been obtained;

         (b) the FCC shall have issued the FCC Order (as defined below)
approving the applications for transfer of control of American's FCC Licenses
in connection with the transactions contemplated herein, and the FCC Order
shall have been obtained without the imposition of conditions that would have a
Material Adverse Effect on Mergeparty's television and radio broadcasting
business; provided that without triggering Mergeparty's right to approve such
conditions or restrictions, the FCC Order (i) may condition consummation of the
Merger on Mergeparty complying with the numerical limits on local multiple
radio ownership imposed by 47 C.F.R. Section 73.3555(a) by affording Mergeparty
a period of at least




                                     - 43 -
<PAGE>   48
six (6) months following the Effective Time within which to comply with such
rule through the use of divestiture trusts on terms and conditions required by
the FCC, provided further, however, that to the extent that the FCC authority
for such divestiture trusts provides for a period of less than six (6) months,
(A) American has the right to postpone the Effective Time (and, to the extent
necessary, the Termination Date), so that Mergeparty is afforded the six (6)
month divestiture period, whether before or after the Effective Time and (B) if
American exercises such right, Mergeparty's right to approve such condition
shall not be triggered, and (ii) may grant Mergeparty temporary, rather than
permanent, waivers of the "one-to-a-market" rule, 47 C.F.R. Section 73.3555(c),
so long as such temporary waivers shall remain in effect until at least six (6)
months following the effective date of FCC action concluding the ongoing
rulemaking proceeding in MM Docket Nos. 91-221, 87-8 (FCC 94-322) or a successor
rulemaking proceeding pending at the time of the grant of the FCC Order, that
considers the "one-to-a-market" rule. The "FCC Order" shall be an action by the
FCC approving the transfer of the American FCC Licenses with respect to which,
except as may be waived in writing by Mergeparty in its sole discretion, (i) no
timely request for stay, petition for reconsideration or appeal or sua sponte
action of the FCC with comparable effect is pending, or (ii) if any of the
foregoing is pending, in the judgment of Mergeparty it lacks any substantial
merit or is contrary to established FCC precedent, or (iii) if it were to be so
granted, it would not have a Material Adverse Effect on Mergeparty's television
and radio broadcasting business; and as to which the thirty (30) day time period
specified in 47 U.S.C. Section 405(a) for initiating a petition for
reconsideration of the grant of the FCC Order has expired;

         (c) no Authority of competent jurisdiction shall have enacted, issued,
promulgated, enforced or entered any Law (whether temporary, preliminary or
permanent) that remains in effect and restrains, enjoins or otherwise prohibits
consummation of the Merger; and

         (d) the waiting period applicable to the consummation of the Merger
under the Hart-Scott-Rodino Act shall have expired or been terminated.

         7.2 Conditions to Obligations of Mergeparty. The obligation of
Mergeparty and Mergeparty Subsidiary to effect the Merger shall be subject to
the satisfaction of the following conditions, any or all of which may be
waived, in whole or in part, to the extent permitted by Applicable Law:

         (a) American shall have furnished Mergeparty, with an opinion, dated
the Closing Date of Dow, Lohnes & Albertson, FCC counsel for American,
substantially in the form attached hereto as Exhibit C;

         (b) (i) the representations and warranties of American set forth in
this Agreement (other than in Sections 4.11 and 4.13) shall be true and correct
as of the date of this Agreement and as of the Closing Date as though made on
and as of the Closing Date except (x) to the extent such representations and
warranties expressly speak as of an earlier date (in which case such
representations and warranties shall be true and correct as of such earlier
date) and (y) to the extent that the failure of such representations and
warranties to be true and correct, individually or in the aggregate, would not
have a Material Adverse Effect on American; provided, however, that for the
purpose of this clause (y), representations and warranties that are qualified
as to materiality (including by reference to "Material Adverse Effect") shall
not be deemed to be so qualified, and (ii) the representations and warranties
of American set forth in Sections 4.11 and 4.13 of this Agreement shall be true
and correct in all material respects;




                                     - 44 -
<PAGE>   49

         (c) American shall have performed in all material respects all
obligations required to be performed by it under this Agreement at or prior to
the Closing Date;

         (d) between the date of this Agreement and the Closing Date, except as
contemplated by this Agreement, including without limitation the Tower Merger
or the Tower Distribution or an Alternative Transaction, as the case may be,
and except as set forth in Section 4.3 of the American Disclosure Schedule,
there shall not have occurred and be continuing any Material Adverse Change in
American; and

         (e) the Tower Merger, the Tower Distribution or an Alternative
Transaction shall have been consummated.

         7.3 Conditions to Obligations of American. The obligation of American
to effect the Merger shall be subject to the satisfaction of the following
conditions, any or all of which may be waived, in whole or in part, to the
extent permitted by Applicable Law:

         (a) the representations and warranties of Mergeparty set forth in this
Agreement shall be true and correct as of the date of this Agreement and as of
the Closing Date as though made on and as of the Closing Date except (x) to the
extent such representations and warranties expressly speak as of an earlier
date (in which case such representations and warranties shall be true and
correct as of such earlier date) and (y) to the extent that the failure of such
representations and warranties to be true and correct, individually or in the
aggregate, would not have a Material Adverse Effect on Mergeparty; provided,
however, that for the purpose of this clause (y), representations and
warranties that are qualified as to materiality (including by reference to
"Material Adverse Effect") shall not be deemed to be so qualified.;

         (b) Mergeparty shall have performed in all material respects all
obligations required to be performed by it under this Agreement at or prior to
the Closing Date; and

         (c) the Tower Merger, Tower Distribution or an Alternative Transaction
shall have been consummated or a Notice of Abandonment shall have been received
by Mergeparty.

                                   ARTICLE 8

                       TERMINATION, AMENDMENT AND WAIVER

         8.1 Termination. This Agreement may be terminated at any time prior to
the Closing Date, whether before or after approval by the stockholders of
American:

         (a) by mutual written consent of American, Mergeparty and Mergeparty
Subsidiary;

         (b) by either Mergeparty or American if any Authority of competent
jurisdiction shall have enacted, issued, promulgated, enforced or entered any
Law that shall have become final and nonappealable and that restrains, enjoins
or otherwise prohibits consummation of the Merger, unless the party seeking
such restraint injunction or prohibition or any Affiliate thereof was the
terminating party;




                                     - 45 -
<PAGE>   50

         (c) by either Mergeparty or American if the Merger shall not have been
consummated by the Termination Date for any reason; provided, however, that the
right to terminate this Agreement under this Section 8.1(c) shall not be
available to any party whose action or failure to act (or the action or failure
to act of any Affiliate) has been a principal cause of or resulted in the
failure of the Merger to occur on or before such date and such action or
failure to act constitutes a breach of this Agreement;

         (d) by either Mergeparty or American if the American Stockholder
Approval shall not have been obtained at the American Stockholders Meeting duly
convened therefor or at any adjournment or postponement thereof or by written
consent;

         (e) by American in the event (i) American is not in material breach of
this Agreement and none of its representations or warranties shall have been or
become and continue to be untrue in any material respect, and (ii) Mergeparty
is in material breach of this Agreement or any of its representations or
warranties shall have become and continue to be untrue in any manner that would
cause the condition in Section 7.3(a) not to be satisfied, and such a breach or
untruth exists and is not capable of being cured by and will prevent or delay
consummation of the Merger by or beyond the Termination Date; or

         (f) by Mergeparty in the event (i) Mergeparty is not in material
breach of this Agreement and none of its representations or warranties shall
have been or become and continue to be untrue in any material respect, and (ii)
American is in material breach of this Agreement or any of its representations
or warranties shall have become and continue to be untrue in any manner that
would cause the condition in Section 7.2(b) not to be satisfied, and such a
breach or untruth exists and is not capable of being cured by and will prevent
or delay consummation of the Merger by or beyond the Termination Date.

The term "Termination Date" shall mean September 30, 1998, as such date may
from time to time be extended pursuant to the provisions of Section 7.1(b) or
by mutual agreement of the parties.

         The right of Mergeparty or American to terminate this Agreement
pursuant to this Section shall remain operative and in full force and effect
regardless of any investigation made by or on behalf of either party, any
Person controlling any such party or any of their respective Representatives,
whether prior to or after the execution of this Agreement.

         8.2 Effect of Termination.

         Except as provided in Sections 6.1 (Access to Information;
Confidentiality), 6.3 (Public Announcements), and 9.3 (Fees, Expenses and other
Payments) and this Section, in the event of the termination of this Agreement
pursuant to Section 8.1, or in the event the Merger shall not have become
effective prior to the end of business on the day prior to the Termination
Date, this Agreement shall forthwith become void and have no effect, without
any liability on the part of any party, or any of its respective stockholders,
officers or directors, to the other; provided, however, that such termination
shall not relieve any party from liability for any breach of any of its
warranties, covenants or agreements set forth in this Agreement and, provided,
however that such termination will not terminate the Confidentiality Agreement.




                                     - 46 -
<PAGE>   51

                                   ARTICLE 9

                               GENERAL PROVISIONS

         9.1 Amendment. This Agreement may be amended from time to time by the
parties hereto at any time prior to the Closing Date but only by an instrument
in writing signed by the parties hereto and, after receipt of the Required Vote
or the American Stockholder Approval, subject, in the case of American, to
Applicable Law.

         9.2 Waiver. At any time prior to the Closing Date, except to the
extent not permitted by Applicable Law, Mergeparty or American may, either
generally or in a particular instance and either retroactively or
prospectively, extend the time for the performance of any of the obligations or
other acts of the other, subject, however, to the provisions of Section 8.1,
waive any inaccuracies in the representations and warranties of the other
contained herein or in any document delivered pursuant hereto, and waive
compliance by the other with any of the agreements, covenants, conditions or
other provision contained herein.  Any such extension or waiver shall be valid
only if set forth in an instrument in writing signed by the party or parties to
be bound thereby.

         9.3 Fees, Expenses and Other Payments. (a) All costs and expenses
incurred in connection with any filing fees (including without limitation
Hart-Scott-Rodino Act filings and FCC filing fees), transfer Taxes, sales
Taxes, document stamps or other charges levied by any Authority in connection
with this Agreement and the Merger shall be borne equally by Mergeparty and
American. All other costs and expenses incurred in connection with the
negotiation, preparation, performance and enforcement of this Agreement
(including all fees and expenses of counsel, financial advisors, accountants,
and other consultants, advisors and representatives for all activities of such
persons undertaken pursuant to this Agreement) incurred by the parties hereto,
shall be borne solely and entirely by the party which has incurred such costs
and expenses, except to the extent, if any, otherwise specifically set forth in
this Agreement.

         (b) In the event that this Agreement is terminated by any party
pursuant to 8.1(d), American shall promptly, but in no event later than two (2)
days after the date of such termination, pay Mergeparty a fee equal to $35
million in immediately available funds plus Expenses. "Expenses" shall mean
reasonable and reasonably documented out-of-pocket fees and expenses incurred
or paid by or on behalf of Mergeparty in connection with the Merger or the
consummation of any of the transactions contemplated by this Agreement,
including all fees and expenses of counsel, commercial banks, investment
banking firms, accountants, experts and consultants to Mergeparty in an
aggregate amount not to exceed $5 million.

         9.4 Notices. All notices and other communications which by any
provision of this Agreement are required or permitted to be given shall be
given in writing and shall be (a) mailed by first-class or express mail,
postage prepaid, or by recognized courier service, (b) sent by telecopy or
other form of rapid transmission, confirmed by mailing (by first class or
express mail, postage prepaid, or by recognized courier service) written
confirmation at substantially the same time as such rapid transmission, or (c)
personally delivered to the receiving party (which if, other than an
individual, shall be an officer or other responsible party of the receiving
party). All such notices and communications shall be mailed, sent or delivered
as follows:




                                     - 47 -
<PAGE>   52

     a)  If to Mergeparty:

            Westinghouse Electric Corporation
            11 Stanwix Street
            Pittsburgh, Pennsylvania  15222
            Attention:  Louis J. Briskman, Esq.
            Telecopier No.:  (412) 642-5224

            with a copy to:

            Cravath, Swaine & Moore
            825 Eighth Avenue
            New York, New York  10019
            Attention:  Allen Finkelson, Esq.
            Telecopier No.:  (212) 474-3700

     b)  If to American:

            American Radio Systems Corporation
            116 Huntington Avenue
            Boston, Massachusetts 02116
            Attention:   Steven B. Dodge, President and Chief Executive Officer
            Telecopier No.:  (617) 375-7575

            with a copy to:

            Sullivan & Worcester LLP
            One Post Office Square
            Boston, Massachusetts 02109
            Attention:  Norman A. Bikales, Esq.
            Telecopier No.:  (617) 338-2880

or to such other person(s), telex or facsimile number(s) or address(es) as the
party to receive any such communication or notice may have designated by
written notice to the other party.

         9.5 Specific Performance; Other Rights and Remedies. Each party
recognizes and agrees that in the event the other party should refuse to
perform any of its obligations under this Agreement or any Collateral Document,
the remedy at law would be inadequate and agrees that for breach of such
provisions, each party shall, in addition to such other remedies as may be
available to it at law or in equity or as provided in Article 8, be entitled to
injunctive relief and to enforce its rights by an action for specific
performance to the extent permitted by Applicable Law. Each party hereby waives
any requirement for security or the posting of any bond or other surety in
connection with any temporary or permanent award of injunctive, mandatory or
other equitable relief.  Nothing herein contained shall be construed as
prohibiting each party from pursuing any other remedies available to it under
Applicable Law or pursuant to the provisions of this Agreement for such breach
or threatened breach, including without limitation the recovery of damages,
including, to the extent awarded in any Legal Action,




                                     - 48 -
<PAGE>   53

punitive, incidental and consequential damages (including without limitation
damages for diminution in value and loss of anticipated profits) or any other
measure of damages permitted by Applicable Law.

         9.6 Survival of Representations, Warranties, Covenants and Agreements.
None of the representations and warranties in this Agreement shall survive the
Merger, and after effectiveness of the Merger neither Mergeparty, American or
their respective officers, directors or shareholders shall have any further
obligation with respect thereto. This Section 9.6 shall not limit any covenant
or agreement of the parties which by its terms contemplates performance after
the Effective Time.

         9.7 Severability. If any term or provision of this Agreement shall be
held or deemed to be, or shall in fact be, invalid, inoperative, illegal or
unenforceable as applied to any particular case in any jurisdiction or
jurisdictions, or in all jurisdictions or in all cases, because of the
conflicting of any provision with any constitution or statute or rule of public
policy or for any other reason, such circumstance shall not have the effect of
rendering the provision or provisions in question invalid, inoperative, illegal
or unenforceable in any other jurisdiction or in any other case or circumstance
or of rendering any other provision or provisions herein contained invalid,
inoperative, illegal or unenforceable to the extent that such other provisions
are not themselves actually in conflict with such constitution, statute or rule
of public policy, but this Agreement shall be reformed and construed in any
such jurisdiction or case as if such invalid, inoperative, illegal or
unenforceable provision had never been contained herein and such provision
reformed so that it would be valid, operative and enforceable to the maximum
extent permitted in such jurisdiction or in such case. Notwithstanding the
foregoing, in the event of any such determination, the parties shall negotiate
in good faith to modify this Agreement so as to effect the original intent of
the parties as closely as possible to the fullest extent permitted by
Applicable Law in an acceptable manner to the end that the Merger is fulfilled
and consummated to the maximum extent possible.

         9.8 Counterparts. This Agreement may be executed in several
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument, binding upon all of the
parties. In pleading or proving any provision of this Agreement, it shall not
be necessary to produce more than one of such counterparts.

         9.9 Section Headings. The headings contained in this Agreement are for
reference purposes only and shall not in any way affect the meaning or
interpretation of this Agreement.

         9.10 Governing Law. The validity, interpretation, construction and
performance of this Agreement shall be governed by, and construed in accordance
with, the Applicable Laws of the United States of America and the laws of the
State of New York applicable to contracts made and performed in such State and,
in any event, without giving effect to any choice or conflict of laws provision
or rule that would cause the application of domestic substantive laws of any
other jurisdiction, except to the extent the corporate laws of the State of
Delaware are applicable. Anything in this Agreement to the contrary
notwithstanding, in the event of any dispute between the parties which results
in a Legal Action, the prevailing party shall be entitled to receive from the
non-prevailing party reimbursement for reasonable legal fees and expenses
incurred by such prevailing party in such Legal Action.

         9.11 Further Acts. Each party agrees that at any time, and from time
to time, before and after the consummation of the transactions contemplated by
this Agreement, it will do all such things and execute and deliver all such
Collateral Documents and other assurances, as the other party or its counsel




                                     - 49 -
<PAGE>   54

reasonably deems necessary or desirable in order to carry out the terms and
conditions of this Agreement and the transactions contemplated hereby or to
facilitate the enjoyment of any of the rights created hereby or to be created
hereunder.

         9.12 Entire Agreement; No Other Representations or Agreements. This
Agreement (together with the Disclosure Schedules and the Exhibits and the
other Collateral Documents delivered or to be delivered in connection herewith)
constitutes the entire agreement of the parties with respect to the subject
matter hereof and supersedes all prior agreements, arrangements, covenants,
promises, conditions, undertakings, inducements, representations, warranties
and negotiations, expressed or implied, oral or written, between the parties,
with respect to the subject matter hereof. Each of the parties is a
sophisticated legal entity that was advised by experienced counsel and, to the
extent it deemed necessary, other advisors in connection with this Agreement.
Each of the parties hereby acknowledges that (a) neither party has relied or
will rely in respect of this Agreement or the transactions contemplated hereby
upon any document or written or oral information previously furnished to or
discovered by it or its representatives, other than this Agreement (including
the Exhibits and the Disclosure Schedules and the other Collateral Documents)
or such of the foregoing as are delivered at the Closing, (b) there are no
covenants or agreements by or on behalf of either party hereto or any of its
respective Affiliates or representatives other than those expressly set forth
in this Agreement and the Collateral Documents, and (c) the parties' respective
rights and obligations with respect to this Agreement and the events giving
rise thereto will be solely as set forth in this Agreement and the Collateral
Documents. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, EACH PARTY HERETO
AGREES THAT, EXCEPT FOR THE REPRESENTATIONS AND WARRANTIES CONTAINED IN THIS
AGREEMENT, NEITHER AMERICAN NOR MERGEPARTY MAKES ANY OTHER REPRESENTATIONS OR
WARRANTIES, AND EACH HEREBY DISCLAIMS ANY OTHER REPRESENTATIONS OR WARRANTIES
MADE BY ITSELF OR ANY OF ITS OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, FINANCIAL
AND LEGAL ADVISORS OR OTHER REPRESENTATIVES, WITH RESPECT TO THE EXECUTION AND
DELIVERY OF THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY,
NOTWITHSTANDING THE DELIVERY OR DISCLOSURE TO THE OTHER OR THE OTHER'S
REPRESENTATIVES OF ANY DOCUMENTATION OR OTHER INFORMATION WITH RESPECT TO ANY
ONE OR MORE OF THE FOREGOING.

         9.13 Assignment. This Agreement shall not be assignable by any party
and any such assignment shall be null and void, except that it shall inure to
the benefit of and be binding upon any successor to each party by operation of
Law, including by way of merger, consolidation or sale of all or substantially
all of its assets, and each party may assign its rights and remedies hereunder
to any bank or other financial institution which has loaned funds or otherwise
extended credit to it.

         9.14 Parties in Interest. This Agreement shall be binding upon and
inure solely to the benefit of each party and their permitted successors and
assigns, and nothing in this Agreement, express or implied, is intended to or
shall confer upon any Person any right, benefit or remedy of any nature
whatsoever under or by reason of this Agreement, except as otherwise provided
in Articles 2 and 3 and Sections 6.8(e), 6.12 and 9.13.

         9.15 Mutual Drafting. This Agreement is the result of the joint
efforts of Mergeparty and American, and each provision hereof has been subject
to the mutual consultation, negotiation and




                                     - 50 -
<PAGE>   55

agreement of the parties and there shall be no construction against either
party based on any presumption of that party's involvement in the drafting
thereof.

         9.16 Obligations of American and of Mergeparty. Whenever this
Agreement requires a Subsidiary of American to take any action, such
requirement shall be deemed to include an undertaking on the part of American
to cause such Subsidiary to take such action. Whenever this Agreement requires
a Subsidiary of Mergeparty to take any action, such requirement shall be deemed
to include an undertaking on the part of Mergeparty to cause such Subsidiary to
take such action and, after the Effective Time, on the part of the Surviving
Corporation to cause such Subsidiary to take such action.

         9.17 Mergeparty Agent for Mergeparty Subsidiary. Anything in this
Agreement to the contrary notwithstanding, Mergeparty Subsidiary hereby grants
Mergeparty an irrevocably power of attorney and hereby irrevocably appoints
Mergeparty its agent for all purposes of this Agreement, including without
limitation for the purpose of executing and delivering extensions of the time
for the performance of any of the obligations or other acts of Mergeparty,
waivers, terminations or amendments, and any action taken by Mergeparty
pursuant to such power of attorney and agency, and any such extension, waiver,
termination or amendment executed and delivered by Mergeparty, shall be binding
upon Mergeparty Subsidiary whether or not it has specifically approved such
action or executed such extension, waiver, termination or amendment.

                            [SIGNATURE PAGE FOLLOWS]





                                     - 51 -
<PAGE>   56



         IN WITNESS WHEREOF, American, Mergeparty and Mergeparty Subsidiary
have caused this Agreement and Plan of Merger to be executed, pursuant to the
authority and approval of each of their respective Boards of Directors, as of
the date first written above by their respective officers thereunto duly
authorized.

                              American Radio Systems Corporation

                              By: __________________________________
                                Name:  Steven B. Dodge
                                Title: Chairman of the Board, President and
                                       Chief Executive Officer

                              Westinghouse Electric Corporation

                              By: __________________________________
                                Name:
                                Title:

                              R Acquisition Corp.

                              By: __________________________________
                                Name:
                                Title:





                                     - 52 -
<PAGE>   57





                                                                      APPENDIX A

                                  DEFINITIONS

         ACCOUNTING FIRM shall have the meaning given to it in Section 6.18.

         ADJUSTMENT AMOUNT shall have the meaning given to it in Section
6.18(d).

         ADVERSE, ADVERSELY, when used alone or in conjunction with other terms
(including without limitation "Affect," "Change" and "Effect") shall mean any
Event that has adversely affected or is reasonably likely to adversely affect
(a) the validity or enforceability of this Agreement or the likelihood of
consummation of the Merger, (b) the business, properties, financial condition
or results of operations of American and its Subsidiaries, taken as a whole, or
the Mergeparty and its Subsidiaries, taken as a whole, as the case may be, or
(c) American's or Mergeparty's, as the case may be, ability to fulfill its
obligations under the terms of this Agreement. Notwithstanding the foregoing,
and anything in this Agreement to the contrary notwithstanding, neither (i) any
Event affecting the radio broadcasting industry or the national or any regional
or market economy generally nor (ii) the Tower Merger or Tower Distribution, as
the case may be, shall be deemed to constitute an Adverse Change, have an
Adverse Effect or to Adversely Affect within the meaning of any of the
foregoing clauses (a) through (c).

         AFFILIATE, AFFILIATED shall mean, with respect to any Person, (a) any
other Person at the time directly or indirectly controlling, controlled by or
under direct or indirect common control with such Person, any other Person of
which such Person at the time owns, or has the right to acquire, directly or
indirectly, twenty percent (20%) or more of any class of the capital stock or
beneficial interest, (c) any other Person which at the time owns, or has the
right to acquire, directly or indirectly, twenty percent (20%) or more of any
class of the capital stock or beneficial interest of such Person, (d) any
executive officer or director of such Person, (e) with respect to any
partnership, joint venture or similar Entity, any general partner thereof, and
(f) when used with respect to an individual, shall include any member of such
individual's immediate family or a family trust.

         AGREEMENT shall have the meaning given to it in the first "Whereas"
paragraph and shall include any amendments executed and delivered by the
parties pursuant to the provisions of Section 9.1.

         ALTERNATIVE TRANSACTION shall have the meaning given to it in Section
6.17(k).

         AMERICAN shall have the meaning given to it in the Preamble.

         AMERICAN BROKERED STATIONS shall mean the radio broadcast stations
which American has the right to acquire, but which as of the date of this
Agreement it is operating pursuant to time brokerage, local marketing or other
similar agreements.

         AMERICAN COMMON STOCK shall have the meaning given to it in Section
3.1(d).

         AMERICAN CONVERTIBLE PREFERRED STOCK shall have the meaning given to
it in Section 3.1(c).

         AMERICAN CUMULATIVE PREFERRED STOCK shall have the meaning given to it
in Section 3.1(b).



<PAGE>   58

         AMERICAN DISCLOSURE SCHEDULE shall mean the American Disclosure
Schedule dated as of the date of this Agreement delivered by American to
Mergeparty simultaneously with the execution and delivery of this Agreement.

         AMERICAN FINANCIAL STATEMENTS shall have the meaning given to it in
Section 4.2.

         AMERICAN OPTIONS shall have the meaning given to it in Section 6.8.

         AMERICAN PREFERRED STOCK shall have the meaning given to it in Section
3.1(c).

         AMERICAN FCC LICENSES means all FCC Licenses issued to American or any
of its Subsidiaries and used in the business or operations of any of the
American Stations, including those listed on Section 4.6(a) of the American
Disclosure Schedule (other than those relating to the American Brokered
Stations, which shall be deemed American FCC Licenses only upon consummation of
the acquisition of the applicable American Brokered Station), and any additions
thereto between the date hereof and the Closing Date. Auxiliary broadcast
licenses issued pursuant to 47 C.F.R. Part 74 shall not be deemed to be
material American FCC Licenses.

         AMERICAN SEC DOCUMENTS shall have the meaning given to it in Section
4.2.

         AMERICAN STATIONS means the radio broadcast stations owned by
American, or which it has the right to acquire (and acquires prior to the
Closing Date but only from and after such acquisition) as of the date of this
Agreement; provided, however, that American Stations shall not include any
American Station disposed of by American subsequent to the date of this
Agreement not in violation of the provisions of this Agreement; further,
provided, that American Stations shall include American Brokered Stations if
the context so requires.

         AMERICAN STOCK means the American Common Stock and the American
Preferred stock.

         AMERICAN STOCKHOLDER APPROVAL shall have the meaning given to it in
Section 6.5.

         AMERICAN STOCKHOLDERS MEETING shall have the meaning given to it in
Section 6.5.

         AMERICAN 10-K shall have the meaning given to it in Section 4.2.

         AMERICAN TAX GROUP shall mean American and those of its Subsidiaries
as are included in the consolidated Federal Income Tax Returns of American.

         AMERICAN TOWER shall have the meaning given to it in the second
"Whereas" paragraph.

         AMERICAN TOWER GROUP shall have the meaning given to it in Section
6.17.

         AMERICAN TOWER SUB shall mean American Radio and Tower Corporation,
Delaware corporation to be organized in the event of the Tower Merger which
will be a wholly-owned subsidiary of American Tower.

         AMERICAN'S KNOWLEDGE (including the term "to the knowledge of
American") means the actual knowledge of the Chief Executive Officer or the
Chief Financial Officer of American, and that such



<PAGE>   59

Officer shall have reason to believe and shall believe that the subject
representation or warranty is true and accurate as stated.

         ANTITRUST DIVISION shall have the meaning given to it in Section
6.2(c).

         APPLICABLE LAW shall mean, with respect to any Person, any Law of any
Authority, whether domestic or foreign, to which such Person is subject or by
which it or any of its business or operations is subject or any of its property
or assets is bound.

         APPLICATIONS shall have the meaning given to it in Section 6.2(b).

         AUTHORITY shall mean any governmental or quasi-governmental authority,
whether administrative, executive, judicial, legislative or other, or any
combination thereof, including without limitation any federal, state,
territorial, county, municipal or other government or governmental or
quasi-governmental agency, arbitrator, authority, board, body, branch, bureau,
central bank or comparable agency or Entity, commission, corporation, court,
department, instrumentality, master, mediator, panel, referee, system or other
political unit or subdivision or other Entity of any of the foregoing, whether
domestic or foreign.

         BENEFIT ARRANGEMENT shall mean, with respect to any Person, any
benefit arrangement that is not a Plan, including (a) any employment, severance
or consulting agreement, (b) any arrangement providing for insurance coverage
or workers' compensation benefits, (c) any incentive bonus or deferred bonus
arrangement, (d) any arrangement providing termination allowance, severance or
similar benefits, (e) any equity compensation plan, and (f) any deferred
compensation plan which American or any ERISA Affiliate maintains, contributes
to or is required to contribute to for the benefit of any current or former
officers, employees, agents, directors or independent contractors of American
or any of its ERISA Affiliates.

         CERTIFICATES shall have the meaning given to it in Section 3.2(b).

         CD AMOUNT shall have the meaning given to it in Section 6.18(c).

         CLAIMS shall mean any and all debts, liabilities, obligations, losses,
damages, deficiencies, assessments and penalties, together with all Legal
Actions, pending or threatened, claims and judgments of whatever kind and
nature relating thereto, and all fees, costs, expenses and disbursements
(including without limitation reasonable attorneys' and other legal fees, costs
and expenses) relating to any of the foregoing.

         CLASS A COMMON shall have the meaning given to it in Section 3.1(d).

         CLASS B COMMON shall have the meaning given to it in Section 3.1(d).

         CLOSING shall have the meaning given to it in Section 2.2.

         CLOSING BALANCE SHEET shall have the meaning given to it in Section
6.18.

         CLOSING DATE shall have the meaning given to it in Section 2.2.

         CLOSING NET DEBT shall have the meaning given to it in Section 6.18.



<PAGE>   60

         CLOSING STATEMENT shall have the meaning given to it in Section 6.18.

         CLOSING WORKING CAPITAL shall have the meaning given to it in Section
6.18.

         COBRA shall mean the Consolidated Omnibus Budget Reconciliation Act of
1985, as amended, as set forth in Section 4980B of the Code and Part 6 of
Subtitle B of Title I of ERISA.

         CODE shall mean the Internal Revenue Code of 1986, and the rules and
regulations thereunder, all as from time to time in effect, or any successor
law, rules or regulations, and any reference to any statutory or regulatory
provision shall be deemed to be a reference to any successor statutory or
regulatory provision.

         COLLATERAL DOCUMENT shall mean any agreement, certificate, contract,
instrument, notice, opinion or other document delivered pursuant to the
provisions of this Agreement, including without limitation, the Confidentiality
Agreement and the Tower Documentation.

         COMMISSION or SEC shall mean the Securities and Exchange Commission
and shall include any successor Authority.

         CONTRACTS shall have the meaning given to it in Section 4.20(a).

         CONFIDENTIALITY AGREEMENT shall mean the letter agreement, dated
August 21, 1997 between American and Mergeparty.

         CONTROL (including the terms "controlled," "controlled by" and "under
common control with") means the possession, directly or indirectly or as
trustee or executor, of the power to direct or cause the direction of the
management or policies of a Person, or the disposition of such Person's assets
or properties, whether through the ownership of stock, equity or other
ownership, by contract, arrangement or understanding, or as trustee or
executor, by contract or credit arrangement or otherwise.

         CONVERTIBLE SECURITIES shall mean any evidences of indebtedness,
shares of capital stock (other than common stock) or other securities directly
or indirectly convertible into or exchangeable for shares of capital stock,
whether or not the right to convert or exchange thereunder is immediately
exercisable or is conditioned upon the passage of time, the occurrence or
non-occurrence or existence or non-existence of some other Event, or both.

         CSFB shall have the meaning given to it in Section 4.14.

         CURRENT ASSETS shall have the meaning given to it in Section 6.18(b).

         DCL shall have the meaning given to it in Section 2.1.

         DEBT AMOUNT shall have the meaning given to it in Section 6.18(c).

         DISCLOSURE SCHEDULE shall mean the Mergeparty Disclosure Schedule, if
any, or the American Disclosure Schedule, as the case may be.

         DISSENTING SHARES shall have the meaning given to it in Section
3.4(a).



<PAGE>   61

         DIVESTITURE CONDITION means any condition imposed or required by the
FCC (including conditions required by the FCC's multiple ownership rules or
policies), the Antitrust Division or the FTC as a condition to its consent to
or approval of the transfer of control of any of the American FCC Licenses or
otherwise to the transactions (or any of them) contemplated by this Agreement,
including without limitation the Merger, or as a condition to its agreement not
to institute any Legal Action to prevent the transfer of control of any of the
American FCC Licenses or otherwise to prevent any of the transactions
contemplated hereby, which would require Mergeparty or any of its Subsidiaries
or any of its other Affiliates to dispose of one or more of the American
Stations or American Brokered Stations, or in Mergeparty's sole discretion, one
or more of the radio broadcast stations owned by Mergeparty and operating in
the same Arbitron Survey area as any of the American Stations or American
Brokered Stations; provided, however, that with respect to compliance with any
condition imposed by the FCC, Mergeparty shall have been afforded a period of
six months, from Closing, through the use of trusts or otherwise, within which
to comply with the radio duopoly overlap rule, 47 C.F.R. Section 73.3555(a), and
Mergeparty shall have been afforded temporary, rather than permanent, waivers
of the one-to-a-market rule, 47 C.F.R. Section 73.3555(c), so long as such
temporary waivers shall remain in effect until at least 6 months following the
effective date of FCC action concluding the ongoing proceeding in MM Docket
Nos. 91-221, 87-8 (FCC 94-322) or a successor rulemaking proceeding pending at
the time of the grant of the FCC Order, that considers the one-to-a-market
rule.

         D&O INSURANCE shall have the meaning given to it in Section 6.12(c).

         EFFECTIVE TIME shall have the meaning given to it in Section 2.3.

         ENTITY shall mean any corporation, firm, unincorporated organization,
association, partnership, limited liability company, trust (inter vivos or
testamentary), estate of a deceased, insane or incompetent individual, business
trust, joint stock company, joint venture or other organization, entity or
business, whether acting in an individual, fiduciary or other capacity, or any
Authority.

         ENVIRONMENTAL LAW excluding any regulations issued by the FCC shall
mean any Law relating to or otherwise imposing liability or standards of
conduct concerning pollution or protection of the environment, including
without limitation, Laws relating to emissions, discharges, releases or
threatened releases of Hazardous Materials into the environment (including,
without limitation, ambient air, surface water, ground water, mining or
reclamation of mined land, land surface or subsurface strata) or otherwise that
relate to the manufacture, processing, generation, distribution, use,
treatment, storage, disposal, cleanup, transport or handling of pollutants,
contaminants, chemicals or industrial, toxic or hazardous substances, materials
or wastes. Environmental Laws shall include without limitation the
Comprehensive Environmental Response, Compensation and Liability Act (42 U.S.C.
Section 6901 et seq.), the Hazardous Material Transportation Act (49 U.S.C.
Section 1801 et seq.), the Resource Conservation and Recovery Act (42 U.S.C.
Section 6901 et seq.), the Federal Water Pollution Control Act (33 U.S.C.
Section 1251 et seq.), the Clean Air Act (42 U.S.C. Section 7401 et seq.), the
Toxic Substances Control Act (15 U.S.C.  Section 2601 et seq.), the
Occupational Safety and Health Act (29 U.S.C. Section 651 et seq.), the Federal
Insecticide, Fungicide and Rodenticide Act (7 U.S.C.  Section 136 et seq.), and
the Surface Mining Control and Reclamation Act of 1977 (30 U.S.C. Section 1201
et seq.), and any analogous federal, state, local or foreign Laws, and the
rules and regulations promulgated thereunder, all as from time to time in
effect, and any reference to any such statutory or regulatory provision shall
be deemed to be a reference to any successor statutory or regulatory provision.



<PAGE>   62

         ENVIRONMENTAL PERMIT shall mean, with respect to any Person, any
Governmental Authorization required by or pursuant to any Environmental Law.

         ERISA shall mean the Employee Retirement Income Security Act of 1974,
and the rules and regulations thereunder, all as from time to time in effect,
or any successor law, rules or regulations, and any reference to any such
statutory or regulatory provision shall be deemed to be a reference to any
successor statutory or regulatory provision.

         ERISA AFFILIATE shall mean any Person that is treated as a single
employer with American under Sections 414(b), (c), (m) or (o) of the Code or
Section 4001(b)(1) of ERISA.

         ESOP shall have the meaning given to it in Section 4.9(a)(xvi).

         EVENT shall mean the existence or occurrence of any act, action,
activity, circumstance, condition, event, fact, failure to act, omission,
incident or practice, or any set or combination of any of the foregoing.

         EXCHANGE ACT shall mean the Securities Exchange Act of 1934, and the
rules and regulations thereunder, all as from time to time in effect, or any
successor law, rules or regulations, and any reference to any such statutory or
regulatory provision shall be deemed to be a reference to any successor
statutory or regulatory provision.

         EXCHANGE AGENT shall have the meaning given to it in Section 3.2(a).

         EXPENSES shall have the meaning given to it in Section 9.3.

         FCA shall mean the Communication Act of 1934, and the rules and
regulations thereunder, all as from time to time in effect, or any successor
law, rules or regulations, and any reference to any such statutory or
regulatory provision shall be deemed to be a reference to any successor
statutory or regulatory provision.

         FCC shall mean the Federal Communications Commission and shall include
any successor Authority.

         FCC CONSENTS means actions by the FCC (including the Chief, Mass Media
Bureau, acting under delegated authority) granting its consent to the transfer
of control of the American FCC Licenses for each of the American Stations to
Mergeparty as contemplated by this Agreement whether or not such consent has
become a Final Order.

         FCC LICENSES means all of the licenses, permits and other
authorizations issued by the FCC to an owner and operator of radio broadcast
stations.

         FCC ORDER shall have the meaning given to it in Section 7.1(b).

         FILED AMERICAN SEC DOCUMENTS shall have the meaning given to it in
Section 4.2.

         FINAL ADJUSTMENT AMOUNT shall have the meaning given to it in Section
6.18(d).



<PAGE>   63

         FINAL ORDER shall mean, with respect to any Authority, including
without limitation the FCC, a consent or approval with respect to which no
appeal, no stay, no petition or application for rehearing, reconsideration,
review or stay, whether on motion of the applicable Authority or other Person
or otherwise, and no other Legal Action contesting such consent or approval, is
in effect or pending and as to which the time or deadline for filing any such
appeal, petition or application or other Legal Action has expired or, if filed,
has been denied, dismissed or withdrawn, and the time or deadline for
instituting any further Legal Action has expired.

         FTC shall have the meaning given to it in Section 6.2(c).

         GAAP shall mean generally accepted accounting principles as in effect
from time to time in the United States of America.

         GOVERNMENTAL AUTHORIZATIONS shall mean all approvals, concessions,
consents, franchises, licenses, permits, plans, registrations and other
authorizations of all Authorities, including the FCC Licenses, issued by the
FCC, the Federal Aviation Administration and any other Authority in connection
with the conduct of business or operations of any of the Stations.

         GOVERNMENTAL FILINGS shall mean all filings, including franchise and
similar Tax filings, and the payment of all fees, assessments, interest and
penalties associated with such filings, with all Authorities.

         HART-SCOTT-RODINO ACT shall mean the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, and the rules and regulations thereunder, all as from
time to time in effect, or any successor law, rules or regulations, and any
reference to any such statutory or regulatory provision shall be deemed to be a
reference to any successor statutory or regulatory provision.

         HAZARDOUS MATERIALS shall mean and include any substance, material,
waste, constituent, compound, chemical, natural or man-made element or force
(in whatever state of matter): (a) the presence of which requires investigation
or remediation under any Environmental Law; or (b) that is defined as a
"hazardous waste" or "hazardous substance" under any Environmental Law; or (c)
that is toxic, explosive, corrosive, etiologic, flammable, infectious,
radioactive, carcinogenic, mutagenic or otherwise hazardous and is regulated by
any applicable Authority or subject to any Environmental Law; or (d) that poses
or threatens to pose a hazard to the health or safety of persons; or (e) that
contains gasoline, diesel fuel or other petroleum hydrocarbons, or any
by-products or fractions thereof, natural gas, polychlorinated biphenyls
("PCBs") and PCB-containing equipment, radon or other radioactive elements,
ionizing radiation, lead, asbestos or asbestos-containing materials, or urea
formaldehyde foam insulation.

         INDEBTEDNESS shall mean, with respect to any Person, without
duplication, (A) all obligations of such Person for borrowed money, or with
respect to deposits or advances of any kind to such Person, (B) all obligations
of such Person evidenced by bonds, debentures, notes or similar instruments,
(C) all obligations of such Person under conditional sale or other title
retention agreements relating to property purchased by such Person, (D) all
obligations of such Person issued or assumed as the deferred purchase price of
property or services (excluding obligations of such Person to creditors for raw
materials, inventory, services and supplies incurred in the ordinary course of
such Person's business), (E) all capitalized lease obligations of such Person,
(F) all obligations of others secured by any Lien on property or assets owned
or acquired by such Person, whether or not the obligations secured thereby have
been assumed, (G) all obligations of such Person under interest rate or
currency hedging transactions (valued at the termination value thereof), (H)
all letters of credit issued for the account of such Person and (I) all



<PAGE>   64

guarantees and arrangements having the economic effect of a guarantee of such
Person or any indebtedness of any other Person.

         INDEMNIFIED PARTIES shall have the meaning given to it in Section
6.12(b).

         INFORMATION STATEMENT shall have the meaning given to it in Section
6.6(a).

         LAW shall mean any (a) administrative, judicial, legislative or other
action, code, consent decree, constitution, decree, directive, enactment,
finding, guideline, law, injunction, interpretation, judgment, order,
ordinance, proclamation, promulgation, regulation, requirement, rule, rule of
law, rule of public policy, settlement agreement, statute, or writ of any
Authority, domestic or foreign; (b) the common law, or other legal or
quasi-legal precedent; or (c) arbitrator's, mediator's or referee's award,
decision, finding or recommendation.

         LEGAL ACTION shall mean, with respect to any Person, any and all
litigation or legal or other actions, arbitrations, counterclaims, hearings,
investigations, proceedings or suits, at law or in arbitration, equity or
admiralty, whether or not purported to be brought on behalf of such Person, by
or before any Authority, against such Person or involving any of such Person's
business or assets.

         LIABILITIES shall have the meaning given to it in Section 6.18(b).

         LIEN shall mean any of the following: mortgage; lien (statutory or
other) or other security agreement, arrangement or interest; hypothecation,
pledge or other deposit arrangement; assignment; charge; levy; executory
seizure; attachment; garnishment; encumbrance (including any easement,
exception, reservation or limitation, right of way, and the like); conditional
sale, title retention or other similar agreement, arrangement, device or
restriction; any financing lease involving substantially the same economic
effect as any of the foregoing; the filing of any financing statement under the
Uniform Commercial Code or comparable law of any jurisdiction; or restriction
on sale, transfer, assignment, disposition or other alienation.

         MATERIAL, MATERIALLY OR MATERIALITY for the purposes of this
Agreement, shall, unless specifically stated to the contrary, be determined
without regard to the fact that various provisions of this Agreement set forth
specific dollar amounts.

         MATERIAL AGREEMENT shall mean, with respect to any Person, any
agreement, arrangement, contract, undertaking, understanding or other
obligation or liability which (a) was not entered into in the ordinary course
of business, it being understood and agreed by the parties that the
acquisition, disposition or exchange of radio stations is in the ordinary
course of business, (b) was entered into in the ordinary course of business
which (i) involved the purchase, sale or lease of goods or materials, or
purchase of services, aggregating more than $10,000,000 during any of the last
three fiscal years of such Person, (ii) extends for more than six (6) months
from the date of this Agreement, or (iii) is not terminable on thirty (30) days
or less notice without material penalty or other payment, (c) involves
indebtedness aggregating more than $10,000,000, (d) is or otherwise constitutes
a written agency, broker, dealer, license, distributorship, sales
representative or similar written agreement, or (e) accounted for more than ten
percent (10%) of the revenues of Mergeparty or American Stations, as the case
may be, in the last fiscal year of such Person or is likely to account for more
than ten percent (10%) of revenues of Mergeparty or American, as the case may
be, during the current fiscal year of such Person.



<PAGE>   65

         MAXIMUM PREMIUM shall have the meaning given to it in Section 6.12(c).

         MERGER CONSIDERATION shall have the meaning given to it in Section
3.1(d).

         MERGEPARTY shall have the meaning given to it in the Preamble.

         MERGEPARTY BROKERED STATIONS shall mean the radio broadcast stations
which Mergeparty has the right to acquire but which as of the date of this
Agreement it is operating pursuant to time brokerage, local marketing or other
similar agreements.

         MERGEPARTY DISCLOSURE SCHEDULE shall mean the Mergeparty Disclosure
Schedule dated as of the date of this Agreement delivered by Mergeparty to
American simultaneously with the execution and delivery of this Agreement.

         MERGEPARTY STATIONS means the radio broadcast stations owned by
Mergeparty, or which it has the right to acquire (and acquires prior to the
Closing Date but only from and after such acquisition) as of the date of this
Agreement; provided, however, that Mergeparty Stations shall not include any
Mergeparty Station disposed of by Mergeparty subsequent to the date of this
Agreement not in violation of the provisions of this Agreement; further,
provided, that the term Mergeparty Stations shall include Mergeparty Brokered
Stations if the context so requires.

         MERGEPARTY SUBSIDIARY shall have the meaning given to it in the
Preamble.

         MERGEPARTY'S KNOWLEDGE (including the term "to the knowledge of
Mergeparty") means the actual knowledge of the Chief Executive Officer or the
Chief Financial Officer of Mergeparty, and that such Officer shall have reason
to believe and shall believe that the subject representation or warranty is
true and accurate as stated.

         MERGER shall have the meaning given to it in the first "Whereas"
paragraph.

         MERGER CONSIDERATION shall have the meaning given to it in Section
3.1(d).

         MULTIEMPLOYER PLAN shall mean a Plan which is a "multiemployer plan"
within the meaning of Section 4001(a)(3) of ERISA.

         NET DEBT shall have the meaning given to it in Section 6.18(c).

         NOTICE OF ABANDONMENT shall have the meaning given to it in Section
2.8.

         NOTICE OF DISAGREEMENT shall have the meaning given to it in Section
6.18.

         NYSE shall mean the New York Stock Exchange.

         OPTION SECURITIES shall mean all rights, options, calls, contracts,
agreements, warrants, understandings, restrictions, arrangements or
commitments, including without limitation, any rights plan or other
anti-takeover agreement or arrangement, evidencing the right to subscribe for,
purchase or otherwise acquire, or otherwise providing for the issuance of
shares of capital stock, voting securities or Convertible Securities, whether
or not the right to subscribe for, purchase or otherwise acquire, or



<PAGE>   66

otherwise providing for the issuance, is immediately exercisable or is
conditioned upon the passage of time, the occurrence or non-occurrence or the
existence or non-existence of some other Event.

         OPTIONHOLDER shall have the meaning given to it in Section 6.8.

         ORGANIC DOCUMENT shall mean, with respect to a Person which is a
corporation, its charter, its by-laws and all stockholder agreements, voting
trusts and similar arrangements applicable to any of its capital stock and,
with respect to a Person which is a partnership, its agreement and certificate
of partnership, any agreements among partners, and any management and similar
agreements between the partnership and any general partners (or any Affiliate
thereof).

         PERMITTED LIENS shall mean (a) Liens for current Taxes not yet due and
payable, and (b) such imperfections of title, easements, encumbrances and
mortgages or other Liens, if any, as are not, individually or in the aggregate,
substantial in character, amount or extent and do not materially detract from
the value, or materially interfere with the present use, of the property
subject thereto or affected thereby, or otherwise materially impair the
business or operations of the American Stations or the Mergeparty Stations, as
the case may be.

         PERSON shall mean any natural individual or any Entity.

         PLAN shall mean, with respect to any Person and at a particular time,
any employee benefit plan which is covered by ERISA and in respect of which
such Person or an ERISA Affiliate is (or, if such plan were terminated at such
time, would under Section 4069 of ERISA be deemed to be) an "employer" as
defined in Section 3(5) of ERISA, which American or any ERISA Affiliate
maintains, contributes to or is required to contribute to for the benefit of
any current or former officers, employees, agents, directors or independent
contractors of American or any of its ERISA Affiliates.

         POST-CLOSING AMERICAN GROUP shall have the meaning given to it in
Section 6.18

         PRIVATE AUTHORIZATIONS shall mean all approvals, concessions,
consents, franchises, licenses, permits, and other authorizations of all
Persons (other than Authorities) including without limitation those with
respect to copyrights, computer software programs, patents, service marks,
trademarks, trade names, technology and know-how.

         PROXY STATEMENT shall mean the proxy statement to be filed with the
Commission by American in connection with the American Shareholders Meeting, if
any.

         REGULATIONS shall mean the federal income tax regulations promulgated
under the Code, as such Regulations may be amended from time to time. All
references herein to specific sections of the Regulations shall be deemed also
to refer to any corresponding provisions of succeeding Regulations, and all
references to temporary Regulations shall be deemed also to refer to any
corresponding provisions of final Regulations.

         REPRESENTATIVES shall have the meaning given to it in Section 6.1.

         REQUIRED VOTE shall have the meaning given to it in Section 4.13.

         REQUIRED DIVESTITURES means all divestitures, terminations,
arrangements and restructurings identified in Section 5.2c) of the Mergeparty
Disclosure Schedule, if any, and all other divestitures,



<PAGE>   67

terminations, arrangements or restructurings, if any, arising after the date of
this Agreement that would have been required to be listed on Section 5.2c) of
the Mergeparty Disclosure Schedule if known to be in existence as of such date
or that are necessary to satisfy any and all Divestiture Conditions.

         RESTATED CERTIFICATE shall have the meaning given to it in Section
4.11.

         Section 162(M) OPTIONS shall have the meaning given to it in Section
6.8(e).

         SECURITIES ACT shall mean the Securities Act of 1933, and the rules
and regulations of the Commission thereunder, all as from time to time in
effect, or any successor law, rules or regulations, and any reference to any
such statutory or regulatory provision shall be deemed to be a reference to any
successor statutory or regulatory provision.

         STATIONS shall mean, collectively, the American Stations and the
Mergeparty Stations.

         SUBSIDIARY shall mean, with respect to a Person, any Entity a majority
of the capital stock ordinarily entitled to vote for the election of directors
of which, or if no such voting stock is outstanding, a majority of the equity
interests of which, is owned directly or indirectly, legally or beneficially,
by such Person or any other Person controlled by such Person.

         SURVIVING CORPORATION shall have the meaning given to it in Section
2.1.

         TAX (and "Taxable," which shall mean subject to Tax), shall mean, with
respect to any Person, (a) all taxes (domestic or foreign), including without
limitation any income (net, gross or other, including recapture of any tax
items such as investment tax credits), alternative or add-on minimum tax, gross
income, gross receipts, gains, sales, use, leasing, lease, user, ad valorem,
transfer, recording, franchise, profits, property (real or personal, tangible
or intangible), fuel, license, withholding on amounts paid to or by such
Person, payroll, employment, unemployment, social security, excise, severance,
stamp, occupation, premium, environmental or windfall profit tax, custom, duty
or other tax, or other like assessment or charge of any kind whatsoever,
together with any interest, levies, assessments, charges, penalties, additions
to tax or additional amounts imposed by any Taxing Authority, (b) any joint or
several liability of such Person with any other Person for the payment of any
amounts of the type described in (a) of this definition, and (c) any liability
of such Person for the payment of any amounts of the type described in (a) as a
result of any express or implied obligation to indemnify any other Person.

         TAX CLAIM shall mean any Claim which relates to Taxes.

         TAX RETURN OR RETURNS shall mean all returns, consolidated or
otherwise (including without limitation information returns), required to be
filed with any Authority with respect to Taxes.

         TAXING AUTHORITY shall mean any Authority responsible for the
imposition of any Tax.

         TERMINATION DATE shall have the meaning given to it in Section 8.1.

         TOWER BUSINESS shall mean the business conducted by the Tower
Subsidiaries.

         TOWER COMMON STOCK shall mean, collectively, the Class A Common Stock,
par value $.01 per share (the "Tower Class A"), the Class B Common Stock, par
value $.01 per share (the "Tower Class



<PAGE>   68

B"), and the Class C Common Stock, par value $.01 per share (the "Tower Class
C"), of American Tower or American Tower Sub, as applicable, or, where the
context requires, one or more of such classes, or, if the common stock of
American Tower or American Tower Sub is not classified, the common stock, par
value $.01 per share, of American Tower or American Tower Sub, as applicable.

         TOWER CONSIDERATION shall have the meaning given to it in Section 6.8.

         TOWER DISTRIBUTION shall have the meaning given to it in the second
"Whereas" paragraph.

         TOWER DISTRIBUTION DATE shall have the meaning given to it in Section
6.17.

         TOWER DOCUMENTATION shall have the meaning given to it in Section
6.17.

         TOWER EMPLOYEES shall have the meaning given to it in Section 6.17.

         TOWER ENTITY shall have the meaning given to it in Section 6.17.

         TOWER LEASES shall have the meaning given to it in Section 6.19.

         TOWER MERGER shall have the meaning given to it in Section 2.8.

         TOWER MERGER DATE shall have the meaning given to it in Section 6.17.

         TOWERS shall have the meaning given to it in Section 6.19.

         TOWER SUBSIDIARIES shall mean American Tower and its Subsidiaries.

         UNCONTROLLABLE EVENTS shall have the meaning given to it in Section
6.2(d).

         WC AMOUNT shall have the meaning given to it in Section 6.18(b).

         WORKING CAPITAL shall have the meaning given to it in Section 6.18(b).